Unable to get source code for app caching

[daheise]

Describe the bug I receive the following warning on bash_app task startup:

serializing id_for_memo_function for function <function wrap_error.<locals>.wrapper at 0xHEXADDR>, type <class 'function'>
[WARNING] Unable to get source code for app caching. Recommend creating module. Exception was: functools.partial (<function hash_results at 0xHEXADDR>), <function APPNAME at 0xHEXADDR) is not module, class, method, function, traceback, frame, or code object

To Reproduce Steps to reproduce the behavior, for e.g:

1. Setup Parsl 1.1.0 with Python 3.6 on cluster
2. Run a task

Expected behavior Caching takes app source code into account.

Environment

• OS: Centos 7 cluster
• Python 3.6
• Parsl 1.1.0

Distributed Environment

• Slurm
• HighThroughputExecutor
• SrunLauncher
• LocalChannel

[benclifford]

I think this a bug that affects any attempts by parsl to get the app source that was introduced by rearrangements I made to try to consolidate all the memoization code in one place - I also get it with a fairly trivial test on my laptop against 1.1.0