Fixes OOIION-742
Merge pull request #979 from lukecampbell/ooiion742

Fixes OOIION-742
Updates coverage model

Support for appending parameters to coverage(s).
Merge pull request #980 from lukecampbell/cov_bump

Updates coverage model
Added and tested additional comms alerts.
Fix persistence tests to use new alert defs.
add hasNetworkParent link between RSN platforms
Bump pyon to include codec fix
 delete remoce_streams op from data product mgmt svc
Merge branch 'master' of github.com:ooici/coi-services
Release Version 2.0.26
Bump Version to 2.0.27-dev
Update README with new deps
Merge branch 'master' of github.com:ooici/coi-services into preload_external_data