Remove remote_exists function and add allow_failure=True

Fixes #15436

Get the `2014.7` branch inline with the `develop` branch and fix the salt-cloud regression on `develop`.
Merge pull request #15443 from rallytime/fix_salt_cloud

Remove remote_exists function and add allow_failure=True
Remove extraneous word
Merge pull request #15451 from terminalmage/gitfs-docs-corrections

Remove extraneous word
Merge branch '2014.7' into develop

Conflicts:
	salt/utils/cloud.py
Merge pull request #15452 from cachedout/dev_up

Dev up