feat: updated CHANGELOG for 2020-07 release

[devbww]

This change is 

[coryan]

Reviewed 1 of 1 files at r1.
Reviewable status: all files reviewed, 3 unresolved discussions (waiting on @devbww)

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CHANGELOG.md, line 9 at r1 (raw file):

### Bigtable

* fix: rotate through backup tests to stay under quota (#4420)

I think CI fixes like this and the #4369 below are uninteresting to our users and we should remove them from the CHANGELOG.

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CHANGELOG.md, line 16 at r1 (raw file):

### Storage

* fix(storage): accept more than one matching log line (#4445)

This, and #4403, #4390 are uninteresting to our users.

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CHANGELOG.md, line 34 at r1 (raw file):

* fix(spanner): examples on how to delete data (#4401)
* feat: use `SELECT 1` to refresh sessions (#4377)
* ci(spanner): auto drop databases for realsies (#4371)

Ditto regarding ci() fixes.

[devbww]

Reviewable status: 0 of 1 files reviewed, 3 unresolved discussions (waiting on @coryan)

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CHANGELOG.md, line 9 at r1 (raw file):

Previously, coryan (Carlos O'Ryan) wrote…

I think CI fixes like this and the #4369 below are uninteresting to our users and we should remove them from the CHANGELOG.

Done.

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CHANGELOG.md, line 16 at r1 (raw file):

Previously, coryan (Carlos O'Ryan) wrote…

This, and #4403, #4390 are uninteresting to our users.

Done.

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CHANGELOG.md, line 34 at r1 (raw file):

Previously, coryan (Carlos O'Ryan) wrote…

Ditto regarding ci() fixes.

Done.

[codecov]

Codecov Report

Merging #4452 into master will increase coverage by 0.15%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4452      +/-   ##
==========================================
+ Coverage   92.43%   92.58%   +0.15%     
==========================================
  Files         869      869              
  Lines       68037    68035       -2     
==========================================
+ Hits        62888    62993     +105     
+ Misses       5149     5042     -107     

Impacted Files	Coverage Δ
...le/cloud/spanner/internal/database_admin_logging.h	0.00% <0.00%> (-100.00%)	⬇️
...le/cloud/spanner/internal/instance_admin_logging.h	0.00% <0.00%> (-100.00%)	⬇️
...cloud/spanner/internal/logging_result_set_reader.h	0.00% <0.00%> (-100.00%)	⬇️
...cloud/spanner/internal/partial_result_set_reader.h	0.00% <0.00%> (-100.00%)	⬇️
...torage/internal/logging_resumable_upload_session.h	0.00% <0.00%> (-100.00%)	⬇️
google/cloud/bigtable/internal/bulk_mutator.h	33.33% <0.00%> (-66.67%)	⬇️
...gle/cloud/storage/internal/curl_download_request.h	16.66% <0.00%> (-66.67%)	⬇️
google/cloud/spanner/bytes.h	51.72% <0.00%> (-48.28%)	⬇️
google/cloud/spanner/testing/mock_spanner_stub.h	11.76% <0.00%> (-47.06%)	⬇️
google/cloud/bigtable/internal/async_poll_op.h	35.13% <0.00%> (-45.95%)	⬇️
... and 80 more

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[coryan]

Reviewed 1 of 1 files at r2.
Reviewable status: complete! all files reviewed, all discussions resolved

[mr-salty]

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CHANGELOG.md, line 9 at r1 (raw file):

Previously, devbww (Bradley White) wrote…

Done.

for future reference, should these have been tagged test rather than fix? (my vote is yes)