randomize email field generation
randomize email field generation

Change-Id: I59dcb566c840d82a3f629d35f8ed19c962b162f0
Reviewed-on: http://review.couchbase.org/53620
Reviewed-by: Venu Uppalapati <5c73d43f38c8de2bc4a2e4d15365e52f60b59dae@gmail.com>
Tested-by: Venu Uppalapati <5c73d43f38c8de2bc4a2e4d15365e52f60b59dae@gmail.com>

mikewied/spring,couchbase/spring,mikewied/spring,couchbase/spring