Update git submodules

* Update docs/submodules/clamp.git from branch 'master'
  to b15c0ff4e642fc4c3a6ebe1ade00b90ad2957141
  - Merge "Removal of useless test files"
  - Removal of useless test files
    
    Removal of useless test files used by previous tests
    
    Issue-ID: CLAMP-854
    Signed-off-by: sebdet <sebastien.determe@intl.att.com>
    Change-Id: I4172427046250fed52984c2b97532370727f0fa0
    
1 file changed