Conflicts:
	app/code/Magento/Indexer/composer.json
	dev/tests/static/testsuite/Magento/Test/Legacy/_files/obsolete_classes.php

[GoInc] MAGETWO-33527 M2 GitHub Update (version 0.74.0-beta6)

- changed command description

- fixed Cache clean flushing whole cache backend

- Fixed CompilerTest code integrity test.

- Changes based on code review feedback.

- Fixed code integrity failure test.

- Changes based on QA feedback.

- changed class member to local variable

- added throws annotation to docblock

- removed hard coded paths

- changed message

- added mode validation

Conflicts:
	app/code/Magento/Indexer/composer.json

- changed exception message

- Fixed code integrity test failure.

- fixed static test

- Fixed a static error.

- Removed hard-coded paths.

- corrected constant name

- fixed CyclomaticComplexity
- fixed integration test

- changed descripyion according to CR.

- fixing incorrect namespace usage

- Fixing code integrity build failure.

- Changes based on CR feedback.

- CR fixes

- Changes based on CR feedback.

- fixed argument description

- update changelog and composer.lock

- Fixed code integrity build failures.

- CR fixes

[South] Bug fixes

- update version with git grep --name-only '0.74.0-beta5' | grep -v 'CHANGELOG.md' | xargs -i@ sed -i 's/0.74.0-beta5/0.74.0-beta6/g' @

[API] Sprint 47 – Sales & Checkout APIs

- Changes based on CR feedback.

- fixed integration test

- Fixed build failures.