use pyon/container to transfer agent config via config_ref, remove check that each data product has a dataset
Merge pull request #1286 from carueda/master

stop port agent even if there's an exception while stopping the instrument agent instance
Bump EPU
Merge pull request #1284 from MauriceManning/1209

use pyon/container to transfer agent config via config_ref, remove check...
correct the way that the device or dataset assoc with the ext dataset agent insance is retrieved.
filter subscriptions and owned resources in the user_info_extension to remove inactive or retired.
Release Version 2.0.59
Bump Version to 2.0.60-dev
use log.debug (not log.exception) upon exception in IMS.stop_instrument_agent_instance in base test class' _stop_instrument: the expected situation when this happens is when the instrument has already been  terminated by its parent platform, so printing the stacktrace is unnecessary noise in the logs.
merge upstream/master