Optimize Docker image footprint

Rebase to python:2-slim
Remove unused pip packages

Change-Id: Idc9dfdc11d4792a63c7c144587c13705e87bb4bc
Issue-ID: MULTICLOUD-505
Signed-off-by: Bin Yang <bin.yang@windriver.com>
diff --git a/multivimbroker/run.sh b/multivimbroker/run.sh
index 9e1542b..9eaf2b3 100755
--- a/multivimbroker/run.sh
+++ b/multivimbroker/run.sh
@@ -38,4 +38,4 @@
     done
 
     tail -F  $logDir/multivimbroker.log
-fi
\ No newline at end of file
+fi