Med: oracledb.sh: Set RESTART_RETRIES back to 0

Restore the previous value of 0 for RESTART_RETRIES as testing
turned up problems when using RESTART_RETRIES=3 and the storage
on which oracle was installed failed.

Signed-off-by: Ryan McCabe <rmccabe@redhat.com>
Merge pull request #271 from ryan-mccabe/master

oracledb.sh: Set RESTART_RETRIES back to 0