explicit parent project

Change-Id: I8c8fcaa4888bc375ac91e48d0f43d820e3c9e163
cannot make project its own project

Change-Id: I84d6902a49477bac2ff89389b7b55154e87627d6
cannot add parent project if we are not admin on both project

Change-Id: I5317942186f0bb2d266a44dbb0acb75b3505c05d
Explicit error messages

Change-Id: I9396cdfb0992649960edc180c8671092b492a9ff
Fix crap introduced in forgeupgrade script

- do not prefix with the database name
- do not speak about system_event
taking account of code review

Change-Id: Ifcc39506f1e66a6e52d3de18b0972889af97c0cd
Merge remote-tracking branch 'gerrit/3632_define_project_as_parent' into tuleap-stable-master

* gerrit/3632_define_project_as_parent:
  taking account of code review
  Explicit error messages
  cannot add parent project if we are not admin on both project
  cannot make project its own project
  explicit parent project

Change-Id: I82c2f06e5d3c928b2ffed28bb73753e76f3589ba
Merge commit 'refs/changes/07/507/1' of ssh://gerrit.tuleap.net:29418/tuleap into tuleap-stable-master

* ssh://gerrit.tuleap.net:29418/tuleap:
  Fix crap introduced in forgeupgrade script

Change-Id: I74227ded132f1a8a52168994ff408fed74585a7c
Tuleap 6.1.99.18

Change-Id: I4b09d33fdeea5b51a9ebdc354df971e17b13ada8