Moves stanzareceiver into an internal package

[djaglowski]

Resolves #2321

> (cd testbed/ && make run-tests-unstable)
TESTS_DIR=tests_unstable_exe ./runtests.sh
=== RUN   TestLog10kDPS
=== RUN   TestLog10kDPS/OTLP
2021/02/18 11:35:57 Starting mock backend...
2021/02/18 11:35:57 Starting Agent (/Users/djaglowski/go/src/github.com/open-telemetry/opentelemetry-collector-contrib/bin/otelcontribcol_unstable_darwin_amd64)
2021/02/18 11:35:57 Writing Agent log to /Users/djaglowski/go/src/github.com/open-telemetry/opentelemetry-collector-contrib/testbed/tests_unstable_exe/results/TestLog10kDPS/OTLP/agent.log
2021/02/18 11:35:57 Agent running, pid=19921
2021/02/18 11:35:58 Starting load generator at 10000 items/sec.
2021/02/18 11:36:00 Agent RAM (RES):   1 MiB, CPU: 0.0% | Sent:     26630 items | Received:    25,400 items (8,463/sec)
2021/02/18 11:36:03 Agent RAM (RES):  44 MiB, CPU:13.3% | Sent:     56649 items | Received:    55,500 items (9,250/sec)
2021/02/18 11:36:06 Agent RAM (RES):  45 MiB, CPU:12.0% | Sent:     86627 items | Received:    85,500 items (9,498/sec)
2021/02/18 11:36:09 Agent RAM (RES):  46 MiB, CPU:12.3% | Sent:    116700 items | Received:   115,600 items (9,633/sec)
2021/02/18 11:36:12 Agent RAM (RES):  47 MiB, CPU:12.7% | Sent:    146700 items | Received:   145,700 items (9,713/sec)
2021/02/18 11:36:13 Stopped generator. Sent:    150000 items
2021/02/18 11:36:13 Gracefully terminating Agent pid=19921, sending SIGTEM...
2021/02/18 11:36:13 Stopping process monitor.
2021/02/18 11:36:13 Agent process stopped, exit code=0
2021/02/18 11:36:13 Sent and received data matches.
2021/02/18 11:36:13 Stopping mock backend...
2021/02/18 11:36:13 Stopped backend. Received:   150,000 items (9,580/sec)
=== RUN   TestLog10kDPS/filelog
2021/02/18 11:36:13 Starting mock backend...
2021/02/18 11:36:13 Starting Agent (/Users/djaglowski/go/src/github.com/open-telemetry/opentelemetry-collector-contrib/bin/otelcontribcol_unstable_darwin_amd64)
2021/02/18 11:36:13 Writing Agent log to /Users/djaglowski/go/src/github.com/open-telemetry/opentelemetry-collector-contrib/testbed/tests_unstable_exe/results/TestLog10kDPS/filelog/agent.log
2021/02/18 11:36:13 Agent running, pid=19956
2021/02/18 11:36:13 Starting load generator at 10000 items/sec.
2021/02/18 11:36:16 Agent RAM (RES):   7 MiB, CPU: 0.0% | Sent:     29900 items | Received:    26,988 items (8,997/sec)
2021/02/18 11:36:19 Agent RAM (RES):  47 MiB, CPU:24.2% | Sent:     59900 items | Received:    56,989 items (9,499/sec)
2021/02/18 11:36:22 Agent RAM (RES):  47 MiB, CPU:24.0% | Sent:     89900 items | Received:    87,203 items (9,689/sec)
2021/02/18 11:36:25 Agent RAM (RES):  47 MiB, CPU:23.3% | Sent:    119900 items | Received:   117,208 items (9,767/sec)
2021/02/18 11:36:28 Agent RAM (RES):  47 MiB, CPU:23.7% | Sent:    149900 items | Received:   147,326 items (9,822/sec)
2021/02/18 11:36:28 Stopped generator. Sent:    150000 items
2021/02/18 11:36:28 Gracefully terminating Agent pid=19956, sending SIGTEM...
2021/02/18 11:36:28 Stopping process monitor.
2021/02/18 11:36:28 Agent process stopped, exit code=0
2021/02/18 11:36:28 Sent and received data matches.
2021/02/18 11:36:28 Stopping mock backend...
2021/02/18 11:36:28 Stopped backend. Received:   150,000 items (9,774/sec)
--- PASS: TestLog10kDPS (31.01s)
    --- PASS: TestLog10kDPS/OTLP (15.66s)
    --- PASS: TestLog10kDPS/filelog (15.35s)
PASS
ok      github.com/open-telemetry/opentelemetry-collector-contrib/testbed/tests_unstable_exe    31.644s
# Test PerformanceResults
Started: Thu, 18 Feb 2021 11:35:57 -0500

Test                                    |Result|Duration|CPU Avg%|CPU Max%|RAM Avg MiB|RAM Max MiB|Sent Items|Received Items|
----------------------------------------|------|-------:|-------:|-------:|----------:|----------:|---------:|-------------:|
Log10kDPS/OTLP                          |PASS  |     16s|    12.5|    13.3|         38|         47|    150000|        150000|
Log10kDPS/filelog                       |PASS  |     15s|    24.1|    24.7|         40|         47|    150000|        150000|

Total duration: 31s

[codecov]

Codecov Report

Merging #2376 (b4c60e7) into main (c519e50) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #2376      +/-   ##
==========================================
- Coverage   90.64%   90.63%   -0.01%     
==========================================
  Files         404      404              
  Lines       20031    20031              
==========================================
- Hits        18158    18156       -2     
- Misses       1415     1416       +1     
- Partials      458      459       +1     

Flag	Coverage Δ
integration	69.26% <ø> (ø)
unit	89.46% <100.00%> (-0.02%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
internal/stanza/config.go	100.00% <ø> (ø)
internal/stanza/converter.go	100.00% <ø> (ø)
internal/stanza/emitter.go	94.11% <ø> (ø)
internal/stanza/receiver.go	100.00% <ø> (ø)
internal/stanza/factory.go	93.75% <100.00%> (ø)
receiver/filelogreceiver/filelog.go	100.00% <100.00%> (ø)
receiver/k8sclusterreceiver/watcher.go	95.29% <0.00%> (-2.36%)	⬇️

---

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