Change 'reportRelease' data type in 'udprovider' schema to string

Currently the reportRelease in the udprovider schema is modelled as integer. In order to store values like “5.1” this needs to be changed to type string.

• This is a breaking change, usage-data-providers major interface version needs to be increased to 3.0

• Provide migration scripts for existing data

• Dependent modules most likely require adjustments to the change:

  • ui-erm-usage →

  • ui-plugin-find-erm-usage-data-provider →

  • mod-eusage-reports →

  • mod-erm-usage-harvester →