In stead of flushall, do selective db flush, as we are now sharing the same redis instance as analytics

Change-Id: I907045f70b63af106ee553eb055ebd863894b52e
(cherry picked from commit a8351cb6734ca1062dde9bc284432efd98eb44be)
Merge pull request #4 from rajreddy/mandal_redis_flush_fix

In stead of flushall, do selective db flush, as we are now sharing the s...