[EmptyMosaic: REST APIs support]
[REST]: coverage post support
[Rest]: more support to post a new coverage
[REST]: clean up HarvestedCoverageResource
Merge branch 'master' of https://github.com/geoserver/geoserver into rest-emptymosaic
Merge branch 'master' of https://github.com/geoserver/geoserver into rest-emptymosaic
Merge branch 'master' of https://github.com/geoserver/geoserver into rest-emptymosaic
Merge pull request #59 from geosolutions-it/rest-emptymosaic

Rest emptymosaic