Update git submodules

* Update docs/submodules/sfc from branch 'master'
  - Create unit tests for 'cleanup.py' module
    
    This is the first attempt to add unit testing capabilities
    to OPNFV/SFC project.
    
    Also we are following the contraints.txt logic which
    helps in the direction of simulating a test env which
    will be as much as close to the real env that the SFC
    testcases are running.
    
    Jira: SFC-127
    Jira: SFC-129
    
    Change-Id: I938d28f9f85614cdefa163949c4ec9f06f5d27b4
    Signed-off-by: Dimitrios Markou <mardim@intracom-telecom.com>
    

1 files changed, 0 insertions, 0 deletions

diff --git a/docs/submodules/sfc b/docs/submodules/sfc
-Subproject f09fb2d100e06d72568dd039f1cf83dc2c6f584
+Subproject ee231b97dbb139ae31d9967b8f3a8ac9611256b