Update git submodules
Update git submodules

* Update plugins/delete-project from branch 'stable-3.1'
  to f6a6426dd5a94c40f20346c5bca325298da65246
  - Merge branch 'stable-3.0' into stable-3.1
    
    * stable-3.0:
      Fix plugin loading under IE 11
    
    Change-Id: Ide4fcd3778085a9708f453360c50bd8fad198bed
    
  - Merge branch 'stable-2.16' into stable-3.0
    
    * stable-2.16:
      Fix plugin loading under IE 11
    
    Change-Id: If63067708dc1520a79fba6563b190cd5b01fc0bf
    
  - Fix plugin loading under IE 11
    
    Bug: Issue 12705
    Change-Id: If06b1612f1f2741fe122ca5842409c6823a22ccd
    
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