default WARN level for oms_simulator; env var oms_simulator.loglevel can used
 to change it
preliminary preparations for port agent coordination
merge upstream/master
disable port agent helper for the moment
include the recently enabled 5 instrument simulator instances (for a total of
 7) on sbe37-simulator.oceanobservatories.org.  The 7 instruments are created
  successfully in test_platform_hierarchy_with_some_instruments  but only 2
  assigned to platforms as there are some strange issues.
merge upstream/master
remove port agent related calls in platform agent: no such coordination is
needed (at least for the time being) per discussion with Edward and Maurice.
 (I'm still keeping the supporting modules port_agent_helper and
 port_agent_packet.)
merge upstream/master
merge upstream/master
some alignment re get_resource_capabilities and get_resource
manually merged adjustments indicated by Ian.
some more alignment with set_resource
some clean-up (ping_resource)
aligning with EXECUTE_RESOURCE
Registering and unregistering data processes
Fixes some typos
Fixes some tests, removes unnecessary code from register/unregister procedures
Merge pull request #844 from shenrie/master

Enhanced governance tests to verify Org global events are published
Add agent persistence capabilities to instrument agent.
Finish agent persistence ops.