Various Python 3 compatibility fixes

This patch adds from fixes to make glue Python 3 compatible. Refs #13 (closed).

cc @duncanmmacleod

mentioned in issue #13 (closed)

mentioned in merge request emfollow/gwcelery!272 (merged)

Ping!

@matthew-pitkin @duncanmmacleod can we merge this is? We need those for the online PE incorporation in gwcelery ...

@ryan.fisher is the glue librarian.

@ryan.fisher Could you please merge this request? It is really necessary for integration of LALInference Parameter Estimation and GWCelery.

Hi @kipp.cannon , please take a look at this. Thanks!

Hi, this isn't my code, so I can't approve it, but the gstlal pipeline uses this code and this patch is OK with respect to that use case (we don't use the auto-generated MD5 hash job name feature, we assign human-readable names to all jobs in the dag, so we're decoupled from this change).

actually ... since us and the PE group are now the only users of this code, and the request comes from you guys, and we're OK with it, I'm going to go ahead and merge it. it can be reverted later if the librarian objects.

mentioned in commit bc04413d

merged