request #7300: Index an docman/phpwiki item instead of update it when it's not already indexed

Change-Id: I5805d95ca5f567c73f70f9b3ef5d9411a7efab4f
Merge commit 'refs/changes/37/2837/3' of ssh://gerrit.tuleap.net:29418/tuleap into tuleap-stable-master

* ssh://gerrit.tuleap.net:29418/tuleap:
  request #7300: Index an docman/phpwiki item instead of update it when it's not already indexed

Change-Id: I7124cef7e1bda9c7d4fe0decd85b9a8b652e9dd4
Tuleap 7.3.99.35

Change-Id: I85378b94ede5c20c9bf545e3b61f041d02d4c610