Configure connection name in ipm

[eflumerf]

Update configuration paradigm for IPM, pass structs with configuration information to connect_for_sends and connect_for_receives.

Add connection_name parameter to configuration, use this when logging so that it is clear which connection is having particular issues.

Description

Resolves #112

This PR replaces the JSON configuration of ipm (in connect_for_receives and connect_for_sends) with configuration structs defined in Receiver and Sender. This removes the JSON dependency from ipm.

Type of change

• Breaking change (whatever its nature)

Testing checklist

• Unit tests pass (e.g. dbt-build --unittest)
• Minimal system quicktest passes (pytest -s minimal_system_quick_test.py)
• Full set of integration tests pass (daqsystemtest_integtest_bundle.sh)

Note that this change needs to be tested together with DUNE-DAQ/iomanager#127.

Further checks

• Code is commented where needed, particularly in hard-to-understand areas
• Code style is correct (dbt-build --lint, and/or see https://dune-daq-sw.readthedocs.io/en/latest/packages/styleguide/)
• If applicable, new tests have been added or an issue has been opened to tackle that in the future.
  (Indicate issue here: # (issue))

[bieryAtFnal]

I have verified that these changes do not affect existing functionality by successfully running a selection of regresssion tests.

[ron003]

I've looked fairly thoroughly and all seems well.