Master branch updates

[chapulina]

Part of gazebo-tooling/release-tools#416

Summary

Update all usage of master

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge

[codecov]

Codecov Report

Merging #45 (8e75bc8) into ign-plugin1 (a80598b) will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           ign-plugin1      #45   +/-   ##
============================================
  Coverage        99.82%   99.82%           
============================================
  Files               15       15           
  Lines              584      584           
============================================
  Hits               583      583           
  Misses               1        1           

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[scpeters]

@osrf-jenkins run tests please