Map / Add ESRI ArcGIS Rest support

[fxprunayre]

• Editor / Add new protocol ESRI:REST
• View mode / Add action "add to map" to ESRI:REST links

• Search results / Add ESRI:REST links to be in the "add to map" dropdown
• Map / Add basic layer support

Therefore some issues appear while adding this feature:

• ArcGIS REST layers are created using:

              olL = new ol.layer.Image({
                source: new ol.source.ImageArcGISRest({
                  params: {},
                  url: url
                })
              });

But ended with the issue openlayers/openlayers#6467 due to an old OL version we are using. So we should consider updating OL, but as Ngeo is involved, it is not a trivial task.

To test for better performance use https://geoadmin.github.io/ol3/apidoc/ol.source.TileArcGISRest.html instead.

Tested with

<?xml version="1.0" encoding="UTF-8"?>
<gmd:MD_Metadata xmlns:gmd="http://www.isotc211.org/2005/gmd" xmlns:gml="http://www.opengis.net/gml"
                 xmlns:gco="http://www.isotc211.org/2005/gco"
                 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
                 xsi:schemaLocation="http://www.isotc211.org/2005/gmd https://www.isotc211.org/2005/gmd/gmd.xsd http://www.isotc211.org/2005/gmx https://www.isotc211.org/2005/gmx/gmx.xsd http://www.isotc211.org/2005/srv http://schemas.opengis.net/iso/19139/20060504/srv/srv.xsd">
  <gmd:fileIdentifier>
      <gco:CharacterString>fd0832b5-37ec-437a-b186-bf9a00a0615d</gco:CharacterString>
  </gmd:fileIdentifier>
  <gmd:language>
      <gmd:LanguageCode codeList="http://www.loc.gov/standards/iso639-2/" codeListValue="eng"/>
  </gmd:language>
  <gmd:dateStamp>
      <gco:DateTime>2019-07-10T09:59:15</gco:DateTime>
  </gmd:dateStamp>
  <gmd:metadataStandardName>
      <gco:CharacterString>ISO 19115:2003/19139</gco:CharacterString>
  </gmd:metadataStandardName>
  <gmd:identificationInfo>
      <gmd:MD_DataIdentification>
         <gmd:citation>
            <gmd:CI_Citation>
               <gmd:title>
                  <gco:CharacterString>ECRINS_EuropeanDrainageNetwork</gco:CharacterString>
               </gmd:title>
            </gmd:CI_Citation>
         </gmd:citation>
         <gmd:abstract>
            <gco:CharacterString>The ISO19115 metadata standard is the preferred
          metadata
          standard to use. If unsure what templates to start with, use this
          one.</gco:CharacterString>
         </gmd:abstract>
         <gmd:extent>
            <gmd:EX_Extent>
               <gmd:geographicElement>
                  <gmd:EX_GeographicBoundingBox>
                     <gmd:westBoundLongitude>
                        <gco:Decimal>-180.00</gco:Decimal>
                     </gmd:westBoundLongitude>
                     <gmd:eastBoundLongitude>
                        <gco:Decimal>180.00</gco:Decimal>
                     </gmd:eastBoundLongitude>
                     <gmd:southBoundLatitude>
                        <gco:Decimal>-90.00</gco:Decimal>
                     </gmd:southBoundLatitude>
                     <gmd:northBoundLatitude>
                        <gco:Decimal>90.00</gco:Decimal>
                     </gmd:northBoundLatitude>
                  </gmd:EX_GeographicBoundingBox>
               </gmd:geographicElement>
            </gmd:EX_Extent>
         </gmd:extent>
      </gmd:MD_DataIdentification>
  </gmd:identificationInfo>
  <gmd:distributionInfo>
      <gmd:MD_Distribution>
         <gmd:transferOptions>
            <gmd:MD_DigitalTransferOptions>
               <gmd:onLine>
                  <gmd:CI_OnlineResource>
                     <gmd:linkage>
                        <gmd:URL>https://water.discomap.eea.europa.eu/arcgis/rest/services/Ecrins/ECRINS_EuropeanDrainageNetwork/MapServer/0</gmd:URL>
                     </gmd:linkage>
                     <gmd:protocol>
                        <gco:CharacterString>ESRI:REST</gco:CharacterString>
                     </gmd:protocol>
                     <gmd:name>
                        <gco:CharacterString>ArcGIS REST LAYER</gco:CharacterString>
                     </gmd:name>
                  </gmd:CI_OnlineResource>
               </gmd:onLine>
               <gmd:onLine>
                  <gmd:CI_OnlineResource>
                     <gmd:linkage>
                        <gmd:URL>https://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer</gmd:URL>
                     </gmd:linkage>
                     <gmd:protocol>
                        <gco:CharacterString>ESRI:REST</gco:CharacterString>
                     </gmd:protocol>
                  </gmd:CI_OnlineResource>
               </gmd:onLine>
            </gmd:MD_DigitalTransferOptions>
         </gmd:transferOptions>
      </gmd:MD_Distribution>
  </gmd:distributionInfo>
</gmd:MD_Metadata>

[fxprunayre]

Will be done in the OL codesprint https://github.com/geonetwork/core-geonetwork/wiki/Openlayers-migration-codesprint-December-2019.. See branch https://github.com/geonetwork/core-geonetwork/tree/olupgrade.

Closing.