Merge pull request #9320 from cachedout/ps-unit-tests

More ps exec module unit tests.
Allow '_in' requisites to match both on ID and name

Under the hood, all '_in' requisites are changed to extends of their
corresponding type. For example, a require_in for a given state extends
the target of the require_in with a 'require' requisite, pointing back
at the state where the require_in was located.

When these extends are reconciled, only the ID declarations are examined
to see if there is a state matching the requisite's target, meaning that
these '_in' requisites cannot point to a 'name' override in the same way
as their counterparts are able to. For more info, see
https://github.com/saltstack/salt/issues/9061.

This commit modifies the extend reconciliation behavior. If there is no
ID declaration matching the requisite's target, then
salt.state.find_name() is used to search the high data for an ID
declaration with a 'name' param matching the requisite target. If a
match is found, then the extend is reconciled against that matching ID.
If no match is found, then the requisite is not found the appropriate
error is returned.
Unit testing cron exec module.
Merge pull request #9330 from cachedout/ps-unit-tests

Unit testing cron exec module.
Merge pull request #9315 from shish/patch-1

Look for crontabs in /usr/lib/cron/tabs when on MacOS
Fix Pylint W0105, string statement has not effect
White-space related lint fixes.
Correct failure when psutil is not installed.

Reformatting.
Initial working code to support specifying additional modules to include in a thin.tgz (think mako :)
Add an "overwrite" arg to force creation of a tarball even if the version number is the same
Merge pull request #9335 from cachedout/ps-unit-tests

Correct failure when psutil is not installed. Also some minor reformatting.
Fix for windows installs without extra_install_args
Suppress tracebacks in states which manage files

This captures exceptions encountered in states that run file.get_managed
or file.manage_file, suppressing the traceback and instead returning a
False result for the state, with a meaningful error message.
Document availability of templating variables, Fix #9261
resolves #7998461

defaults module can be used to add default variables to a formula without the need for a pillar
Merge pull request #9339 from basepi/slsvars9261

Document availability of templating variables, Fix #9261
Fix typo from #9195
Merge pull request #9345 from basepi/typo9195

Fix typo from #9195
Updated docstrings
Display templating error in cmd.script states

This shows the actual templating error instead of just returning that
there was an error with caching the script.
Raise SaltRenderError exceptions rather than suppressing them