Fix Drop For Indexes During Initial Build

Drop for Indexes during Initial Build needs to clean
up index from maintenance stream as well

Change-Id: I5d415002c988a42e4e9d80f82fd8502aa359d9a1
Reviewed-on: http://review.couchbase.org/43713
Reviewed-by: Sarath Lakshman <sarath@couchbase.com>
Reviewed-by: Deepkaran Salooja <deepkaran.couchbase@gmail.com>
Tested-by: Deepkaran Salooja <deepkaran.couchbase@gmail.com>