Fixes cleanup in DPMS and added data product cleanup in some tests.
Fixes empty coverage registration bug in this test.
Patches some tests (EOI) to ensure correct dataset creation.
Merge pull request #454 from lukecampbell/cleanup_fixes

Fixes cleanup in DPMS and added data product cleanup in some tests.
Restore datastore service tests (despite not using this service)
Merge pull request #457 from daf/unskip_coi_test

Restore datastore service tests (despite not using this service)
Merge branch 'data_agent' of github.com:tgiguere/coi-services into data_agent

Conflicts:
	ion/agents/data/test/test_external_dataset_agent.py
	ion/agents/data/test/test_external_dataset_agent_netcdf.py
	ion/agents/data/test/test_external_dataset_agent_ruv.py
	ion/agents/data/test/test_external_dataset_agent_slocum.py