Reverting b6ef3fe9. We will take this change later after more discussion in mainline
This will break the support of multiple policy for a service chain.

https://github.com/Juniper/contrail-controller/commit/d3c9608c64d5fd42d201099ad2e81bcd2ee45ca1
Closes-Bug: 1403346, 1403590

Change-Id: I857d678ea5ae2e3cc73dad51dd2e1b1908e307e8