IMPALA-7648: add tests for OOM from scanning big string
IMPALA-7648: add tests for OOM from scanning big string

This extends test_insert_large_string to exercise the OOM code path.

Change-Id: I0d1e9b2e8cf6e167da2542950ae90717d4865e9b
Reviewed-on: http://gerrit.cloudera.org:8080/12123
Reviewed-by: Tim Armstrong <2f8e34250f03a653da3dc27f7ec203eafdde80fc@cloudera.com>
Tested-by: Impala Public Jenkins <039b6b20426ff68ebe492b3021890d8c8fd010c9@cloudera.com>

cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala,cloudera/Impala