fOOIION-1374: fix calls to _get_recursion_parameter;  add specific test exercising recursion=False with a small platform hierarchy: ion/services/sa/observatory/test/test_platform_launch.py:TestPlatformLaunch.test_hierarchy_recursion_false
Merge pull request #1572 from carueda/OOIION-1374_rebase

Fix handling of recursion parameter in the platform agent's FSM handler