Fix failure of incompatible col stats test during exhaustive test run
Fix failure of incompatible col stats test during exhaustive test run

This test was failing on 'exhaustive' test runs because a table/db of the
same name can be created twice for different exec option dimensions.
Since this test doesn't actually care about exploring exec options, the fix is just to
limit it to a single exec option. We might want to consider appending the exec option
value string to any test databases created to help uniquify the names if there are other
tests we want to run in parallel while performing DDL and exploring different exec
options.

Change-Id: I8db79b6387f7f1b87b1391e9dc93c20aad7cd667
Reviewed-on: http://gerrit.ent.cloudera.com:8080/1073
Reviewed-by: Ishaan Joshi <d1d1e60202ec9f2503deb1b724986485a125d802@cloudera.com>
Reviewed-by: Lenni Kuff <724b7df200764f5dc1b723c05ee6c6adabd11bb1@cloudera.com>
Tested-by: Lenni Kuff <724b7df200764f5dc1b723c05ee6c6adabd11bb1@cloudera.com>

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