Fix performance bug with large number of unnamed parameters

On some occasions where col in (:args) contain a really lot args, 10k+ for instance, this commit fixes a performance (high CPU) bug by NOT traversing the whole map in basically O(n^2) manner

Signed-off-by: Mikhail Fedorov <mfedorov761@gmail.com>

Author: Fedorov, Mikhail

spring-data-jdbc/src/main/java/org/springframework/data/jdbc/core/convert/QueryMapper.java

@@ -638,6 +638,7 @@ private static String getUniqueName(MapSqlParameterSource parameterSource, Strin
 		do {
 			uniqueName = name + (counter++);
 		} while (values.containsKey(uniqueName));
+
 		return uniqueName;
 	}