Move over ml-content to ml-data, to follow suite with ml-gradle's mlLoadData task and remove other OBE tasks

[grtjn]

Allows dropping mlLoadContent task as well. Use collections.properties to assign a config collection to those docs..

[mariannemyers]

Remove mlLoadContent in build.gradle.

[mariannemyers]

Also remove setSchemasPermissions and setModulesPermissions tasks. Also root/admin/fix-permissions.xqy.

[mariannemyers]

Also rename ml-modules to ui-modules and add the appropriate property to gradle.properties. Also for ui-data. Examples:

mlModulePaths=src/main/ml-modules,src/main/ui-modules mlDataPaths=src/main/ml-data,src/main/ui-data

src/main/ml-modules and src/main/ml-data don’t necessarily have to exist.. ignored silently if they are missing