fixed rertieval of generated keys for HSQLDB 1.9 and fixed some typos (SPR-6266)

Author: Thomas Risberg

org.springframework.jdbc/src/main/java/org/springframework/jdbc/core/simple/AbstractJdbcInsert.java

@@ -418,7 +418,7 @@ private Number executeInsertAndReturnKeyInternal(final List<Object> values) {
 			return kh.getKey();
 		}
 		else {
-			throw new DataIntegrityViolationException("Unable to retreive the generated key for the insert: " +
+			throw new DataIntegrityViolationException("Unable to retrieve the generated key for the insert: " +
 					getInsertString());
 		}
 	}