story #7437: Add a new priority field which does'nt display anything at that time

Change-Id: I1a252161568083cfc49b6e0b46e267e63e641daa
Story #7437 - Display global rank in the field value

Change-Id: I706c91121d8dedced67112c32978d09323060095
story #7437: Check the field in report (sort, search, chart, aggregates, cardwall)

Change-Id: I38c40fca888366cb388797c44b2e7297fc2eecef
story #7437: Definition is NOT given through SOAP

Change-Id: I91154de4aa4dd0a2299fb4ce64e7831db639955e
story #7437: Definition is given through REST

Change-Id: Ib91b2f0ffcceb727b6c66d03da7c738236147f20
story #7437: It can be used as source of a computed value and not generate notices

Change-Id: I8a2206a19651b5d041bc523dd15153321562f8b4
Merge commit 'refs/changes/85/3085/3' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  story #7437: It can be used as source of a computed value and not generate notices
  story #7437: Definition is given through REST
  story #7437: Definition is NOT given through SOAP
  story #7437: Check the field in report (sort, search, chart, aggregates, cardwall)
  Story #7437 - Display global rank in the field value
  story #7437: Add a new priority field which does'nt display anything at that time
This is Tuleap 7.5.99.31

Change-Id: I2b94ac1a6c860748875fc75817b0a12843596ffd