Add check for '.' in require/watch requisites

This commit will cause require/watch requisites to fail if they contain
dots. The prior behavior just ignored the dot, but since the function
name is ignored, and dots are already illegal in prereq requisites, this
commit makes the behavior more consistent.
Make requisite_ins throw errors when '.' in state

This changes the behavior added in #8823, causing requisite_ins to throw
errors instead of logging warnings when there is a '.' in the state that
is being required/watched/etc.
Fix requisite tests

Now that state.func_name is invalid in requisites, remove them from this
test.
Merge pull request #9059 from terminalmage/issue5919

Add check for '.' in require/watch requisites