[GEOS-6274] Graduate WCS 2.0 EO module to extension status
 - #GEOS-6275
Updating GS code to deal with GEOT-4640
Merge pull request #451 from geosolutions-it/GEOT-4640-dependency

Updating GS code to deal with GEOT-4640
Merge pull request #447 from aaime/wcs_eo_extension

[GEOS-6274] Graduate WCS 2.0 EO module to extension status
Updating WCS-20_EO to GEOT-4640
 - #JIRA-6275 : removing unusefull and personal comments
Adding missing file
Merge pull request #449 from geoserver/GEOS-6275

 - #GEOS-6275