Prevent a keyerror when cloud mapping

removed the requirement that 'minion' must be in nodedata if 'minion' is in overrides. this requirement threw a keyerror on me.
Try to add docker network_mode argument
Fix syntax error
VT support for buildout mods
Clarify that templates are used on managed files
Add example of using py renderer for file.managed
fixes potential ext_pillar line mismatches
Merge pull request #13634 from victorlin/docker-network-mode

Docker network mode
Merge pull request #13636 from makinacorpus/f1

VT support for buildout mods
Merge pull request #13641 from terminalmage/docs

Clarify that templates are used on managed files
Merge pull request #13649 from nlm/develop

fixes potential ext_pillar line mismatches
Fixes exception that fires when config_get() is called and user has no .gitconfig
Reflect the latest released version

I did this exact PR in #12695 the last time around. Luckily #12720 seems to take a stab at automating this. :)
Merge pull request #13650 from holmboe/patch-2

Reflect the latest released version
Corrected tiny typo
Merge pull request #13652 from sbellem/help-docs

Corrected tiny typo
One more cloud config unit test
Merge pull request #13653 from rallytime/cloud_config_tests

One more cloud config unit test
Changes to schedule.modify to show a diff of what has changes when a scheduled job is updated.  Also some cleanup of duplicated code between add and modify, now moved into a common build_schedule_item function.  Some additional cleanup and the initial work on a state to manage scheduled jobs.
lint fixes