Update git submodules
Update git submodules

* Update plugins/hooks from branch 'master'
  to aa4252417f54e28db3a7fa1f98d9a06d8ce49465
  - Merge branch 'stable-2.15'
    
    * stable-2.15:
      Log a warning when a hook exits with error status
      Include hook name in error message when logging output failed
      Log a warning when a hook times out
      Use Logger's built-in string formatting
    
    Change-Id: Iac58aca64c9699f28ea105850e9fdefbea1e3e64
    
  - Merge branch 'stable-2.14' into stable-2.15
    
    * stable-2.14:
      Log a warning when a hook exits with error status
      Include hook name in error message when logging output failed
      Log a warning when a hook times out
      Use Logger's built-in string formatting
    
    Change-Id: I8dbc6b71eb46adfcd06b0e64684d78d33c327110
    
  - Log a warning when a hook exits with error status
    
    The hook's exit status and output were always logged, but only at
    debug level.
    
    Change it so that when the exit status is an error (non-zero) it is
    logged at warning level.
    
    Change-Id: I4e7079a897e0d88b3c69f392f634096f477f7780
    
  - Include hook name in error message when logging output failed
    
    Change-Id: I1eb5343ba08baef82023b94f22cea0819e97b864
    
  - Log a warning when a hook times out
    
    Change-Id: I71bf3ec5f2c85470ff91b7afe80a82a2df0c42e3
    
  - Use Logger's built-in string formatting
    
    Change-Id: Ia888e1f27069d556ada7283c20e837c19be61424
    
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