chore: Don't send service priority if not set

[sandrask]

Sidetree VDR: Don't send service priority if not set

Closes #296

Signed-off-by: Sandra Vrtikapa [email protected]

[codecov]

Codecov Report

Merging #297 (d77d3f9) into main (1ef20ed) will decrease coverage by 2.91%.
The diff coverage is 100.00%.

❗ Current head d77d3f9 differs from pull request most recent head e2e5a7b. Consider uploading reports for the commit e2e5a7b to get more accurate results

@@            Coverage Diff             @@
##             main     #297      +/-   ##
==========================================
- Coverage   85.18%   82.26%   -2.92%     
==========================================
  Files          25        2      -23     
  Lines        4003      344    -3659     
==========================================
- Hits         3410      283    -3127     
+ Misses        354       31     -323     
+ Partials      239       30     -209     

Impacted Files	Coverage Δ
component/vdr/sidetree/client.go	81.62% <100.00%> (ø)
.../vdr/trustbloc/config/memorycacheconfig/service.go
component/storage/couchdb/store.go
...omponent/vdr/trustbloc/didconfiguration/helpers.go
...vdr/trustbloc/discovery/staticdiscovery/service.go
component/vdr/trustbloc/models/stakeholder.go
component/vdr/orb/internal/ldcontext/ldcontext.go
component/vdr/orb/vdr.go
...nt/vdr/trustbloc/config/signatureconfig/service.go
...omponent/vdr/trustbloc/didconfiguration/service.go
... and 14 more

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