Initial myfeatures functionality

[ZakarFin]

Includes:

• copy myplacesimport to new bundle and rename stuff and call new actio… #2873
• MyFeatures: Match layer getter route with server impl #2892
• Parsing and layer support for myf-layers #2895
• Rewrite MyFeaturesService as es class #2904
• MyFeatures: instance extends from BasicBundleInstance #2905
• MyFeatures: Saving an edited layer works #2906
• Handle DescribeLayer for myfeatures layers #2907
• MyFeatures: Allow publishing myfeatures layers #2908

Works:

• importing myfeatures layers
• removing myfeatures layers
• opening the layer edit form
• showing the layer on map (with default styling)
• publishing myfeatures layers
• myfeatures layers handled as wfslayers on embedded maps

So pretty much everything that would allow migrating userlayers to myfeatures layers.

Not included:

• anything related to modifying/adding/removing vetor features from myfeatures layers (ie myplaces style of functionality)
• adding new myfeatures layers without doing an import from file
• ui for relabeling feature properties/formatting property values

[CLAassistant]

All committers have signed the CLA.