story #7174: Rename angular directory to planning-v2

Change-Id: Ib5e8c55bc928313aef983766c9bae71eeebf6a49
Merge commit 'refs/changes/94/3394/1' of ssh://gerrit.tuleap.net:29418/tuleap into stable

* ssh://gerrit.tuleap.net:29418/tuleap:
  story #7174: Rename angular directory to planning-v2
This is Tuleap 7.8.99.20

Change-Id: I87b8d98a13175283b21b038ef4938a1fb26cf127