Split application configuration into separate modules and add tests

[andrewwhitehead]

• Move command line parsing into config/argparse
• Move context initialization into config/default_context (add ContextBuilder class)
• Move logging into config/logging
• Add related unit tests, plus tests for conductor and dispatcher

[codecov]

Codecov Report

Merging #23 into master will increase coverage by 1.44%.
The diff coverage is 73.8%.

@@            Coverage Diff             @@
##           master      #23      +/-   ##
==========================================
+ Coverage   66.64%   68.09%   +1.44%     
==========================================
  Files         173      176       +3     
  Lines        7216     7384     +168     
==========================================
+ Hits         4809     5028     +219     
+ Misses       2407     2356      -51

[ianco]

I get an error running the agent with the updates from this PR:

tob-agent_1 | 2019-06-30 14:38:38,033 aries_cloudagent.conductor ERROR Unable to start administration API
tob-agent_1 | Traceback (most recent call last):
tob-agent_1 | File "/home/indy/aries_cloudagent/admin/server.py", line 169, in make_application
tob-agent_1 | f"{protocol_module_path}.routes"
tob-agent_1 | File "/home/indy/aries_cloudagent/classloader.py", line 102, in load_module
tob-agent_1 | mod = import_module(mod_path)
tob-agent_1 | File "/home/indy/.pyenv/versions/3.6.8/lib/python3.6/importlib/init.py", line 126, in import_module
tob-agent_1 | return _bootstrap._gcd_import(name[level:], package, level)
tob-agent_1 | File "", line 994, in _gcd_import
tob-agent_1 | File "", line 971, in _find_and_load
tob-agent_1 | File "", line 955, in _find_and_load_unlocked
tob-agent_1 | File "", line 665, in _load_unlocked
tob-agent_1 | File "", line 678, in exec_module
tob-agent_1 | File "", line 219, in _call_with_frames_removed
tob-agent_1 | File "/home/indy/src/subdir/credential-registry/message_families/issuer_registration/indy_catalyst_issuer_registration/routes.py", line 13, in
tob-agent_1 | from .manager import IssuerRegistrationManager
tob-agent_1 | File "/home/indy/src/subdir/credential-registry/message_families/issuer_registration/indy_catalyst_issuer_registration/manager.py", line 8, in
tob-agent_1 | from aries_cloudagent.messaging.util import send_webhook
tob-agent_1 | ImportError: cannot import name 'send_webhook'
tob-agent_1 |
tob-agent_1 | During handling of the above exception, another exception occurred:
tob-agent_1 |
tob-agent_1 | Traceback (most recent call last):
tob-agent_1 | File "/home/indy/aries_cloudagent/conductor.py", line 184, in start
tob-agent_1 | await self.admin_server.start()
tob-agent_1 | File "/home/indy/aries_cloudagent/admin/server.py", line 211, in start
tob-agent_1 | self.app = await self.make_application()
tob-agent_1 | File "/home/indy/aries_cloudagent/admin/server.py", line 173, in make_application
tob-agent_1 | self.logger.error(
tob-agent_1 | AttributeError: 'AdminServer' object has no attribute 'logger'