Log scanner Open() errors
Log scanner Open() errors

While the status is propagated to the runtime profile, it helps
to have it in the log file in cases where the profile is not
available.

Testing: Verified the message is logged by setting PREPARE_SCANNER
debug action.

Change-Id: I595d509ca24077b924923fa9aa4cdb912c21c9f2
Reviewed-on: http://gerrit.cloudera.org:8080/13018
Reviewed-by: Impala Public Jenkins <039b6b20426ff68ebe492b3021890d8c8fd010c9@cloudera.com>
Tested-by: Impala Public Jenkins <039b6b20426ff68ebe492b3021890d8c8fd010c9@cloudera.com>
Reviewed-on: https://gerrit.sjc.cloudera.com/c/cdh/impala/+/49580
Tested-by: Jenkins User <d95b56ce41a2e1ac4cecdd398defd7414407cc08@cloudera.com>
Reviewed-by: Laszlo Gaal <57b770caf3b7d570ebf40813dac2ce5f53722fa7@cloudera.com>
CDH-Build: Laszlo Gaal <57b770caf3b7d570ebf40813dac2ce5f53722fa7@cloudera.com>
Quasar-L0: Laszlo Gaal <57b770caf3b7d570ebf40813dac2ce5f53722fa7@cloudera.com>

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