Adding Documentation for ECMP and RT-Filter testcases. Marking one case in rt_filter suite for sanity.
Change-Id: Ie0cc4800ad07c513a30e5388fefb21af96672fc4
Merge "Adding Documentation for ECMP and RT-Filter testcases. Marking one case in rt_filter suite for sanity. Change-Id: Ie0cc4800ad07c513a30e5388fefb21af96672fc4" into R2.0