Add support for new JobRouter syntax (HTCONDOR-243)

[brianhlin]

• By default, we'll continue to use JOB_ROUTER_DEFAULTS + JOB_ROUTER_ENTRIES but expose folks to the transforms and the config knobs that they'll need to use them
• For comparing pre/post transforms to the logic in the JOB_ROUTER_DEFAULTS, consult https://github.com/htcondor/htcondor-ce/blob/V5-branch/src/condor_ce_router_defaults#L9-L166

[matyasselmeci]

A few comments but overall fine; pre-approving.

[brianhlin]

@johnkn fixed in this commit 7993b98. FWIW, though, we set ROUTED_JOB_MAX_TIME in the same file that we're adding this config, which the admin would have to root around to find, and if they muck with the file there's a good chance that they just break the CE completely. Another pair of suspenders never hurts, though!

[brianhlin]

@johnkn @matyasselmeci is there anything else? I believe the CI failures as of late are unrelated to these changes (osg-test needs to be updated and EL7 UW build tests were failing because of the blahp repo issue last Friday)

[matyasselmeci]

Nothing from me.

[brianhlin]

Overriding osg-test failures as it requires updates to osg-test