Beautify SuggestSearchTests.

SuggestSearchTests had tons of duplicate code and didn't use all of the
fancy new integration test helper method.  I've removed a ton of duplicate
code and used as many of the nice test helper method I could think of.

Closes #3611
Remove createMapped and mapping helpers from AbstractSharedClusterTest

our tests should use the API we have in favor of hard to read / understand
test helpers.