Map ORA-30006 to CannotAcquireLockException as well

ORA-00054 is already mapped to CannotAcquireLockException and is
described as

  "resource busy and acquire with NOWAIT specified"

As pointed out in the associated JIRA issue, ORA-30006 is quite similar
being described as

  "resource busy; acquire with WAIT timeout expired"

This commit maps ORA-30006 to CannotAcquireLockException as well.

Issue: SPR-9141

spring-jdbc/src/main/resources/org/springframework/jdbc/support/sql-error-codes.xml

@@ -181,7 +181,7 @@
 			<value>17002,17447</value>
 		</property>
 		<property name="cannotAcquireLockCodes">
-			<value>54</value>
+			<value>54,30006</value>
 		</property>
 		<property name="cannotSerializeTransactionCodes">
 			<value>8177</value>