Update module hashicorp/terraform to v0.12.7

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/hashicorp/terraform	require	patch	v0.12.6 -> v0.12.7

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Release Notes

hashicorp/terraform

v0.12.7

Compare Source

0.12.7 (August 22, 2019)

NEW FEATURES:

• New functions regex and regexall allow applying a regular expression pattern to a string and retrieving any matching substring(s) (#​22353)

ENHANCEMENTS:

• lang/funcs: lookup() can work with maps of lists, maps and objects (#​22269)
• SDK: helper/acctest: Add function to return random IP address (#​22312)
• SDK: httpclient: Introduce composable UserAgent(version) (#​22272)
• connection/ssh: Support certificate authentication (#​22156)

BUG FIXES:

• config: reduce MinIems and MaxItems validation during decoding, to allow for use of dynamic blocks (#​22530)
• config: don't validate MinItems and MaxItems in CoerceValue, allowing providers to set incomplete values (#​22478)
• config: fix panic on tuples with for_each (#​22279)
• config: fix references to each of for_each in provisioners (#​22289)
• config: fix panic when using nested dynamic blocks (#​22314)
• config: ensure consistent evaluation when moving between single resources and for_each in addressing (#​22454)
• core: only start a single instance of each required provisioner (#​22553)
• command: fix issue where commands occasionally exited before the error message printed (#​22373)
• command/0.12upgrade: use user-supplied plugin-dir (#​22306)
• command/hook_ui: Truncate the ID considering multibyte characters (#​18823)
• command/fmt: Terraform fmt no longer inserts spaces after % (#​22356)
• command/state: Allow moving resources to modules not yet in state (#​22299)
• backend/google: Now using the OAuth2 token endpoint on googleapis.com instead of google.com. These endpoints are equivalent in functionality but googleapis.com hosts are resolvable from private Google Cloud Platform VPCs where other connectivity is restricted. (#​22451)

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