(PDB-798) Add capability to use regexp when querying fact-nodes path types

This adds the new operator ~> which is a path regexp operator that only works
against the `path` type. It works by internally converting the array of
regular expressions into a single regular expression for querying
fact paths.

Signed-off-by: Ken Barber <ken@bob.sh>
(maint) Fix old acceptance test refspec issue

The old refspec for acceptance testing source code only really worked for the
PR testing workflow. This patch makes it work for the command line or polling
based workflow as well.

Without it, it makes it hard to run beaker acceptance tests from the command
line.

Signed-off-by: Ken Barber <ken@bob.sh>
Merge pull request #1037 from kbarber/ticket/master/pdb-798-regexp-for-fact-node-paths

(PDB-798) Add capability to use regexp when querying fact-nodes path types
Merge pull request #1038 from kbarber/maint/master/fix-accetpance-refspec-issue

(maint) Fix old acceptance test refspec issue