Add TestGroup.CUSTOM_COMPILATION

Previously building with JDK > 1.8 b88 caused test failures due to errors
with custom compilers like Jibx and Jasper reports.

This commit adds a new TestGroup named CUSTOM_COMPILATION that allows the
CI server to continue to run these tests but allow committers to ignore
these tests.

spring-core/src/test/java/org/springframework/tests/TestGroup.java

@@ -59,8 +59,14 @@ public enum TestGroup {
 	/**
 	 * Tests that should only be run on the continuous integration server.
 	 */
-	CI;
+	CI,
 
+	/**
+	 * Tests that require custom compilation beyond that of the standard JDK. This helps to
+	 * allow running tests that will otherwise fail when using JDK >  1.8 b88. See
+	 * <a href="https://jira.springsource.org/browse/SPR-10558">SPR-10558</a>
+	 */
+	CUSTOM_COMPILATION;
 
 	/**
 	 * Parse the specified comma separates string of groups.

spring-core/src/test/java/org/springframework/tests/TestGroupTests.java

@@ -64,7 +64,7 @@ public class TestGroupTests {
 		thrown.expect(IllegalArgumentException.class);
 		thrown.expectMessage("Unable to find test group 'missing' when parsing " +
 				"testGroups value: 'performance, missing'. Available groups include: " +
-				"[LONG_RUNNING,PERFORMANCE,JMXMP,CI]");
+				"[LONG_RUNNING,PERFORMANCE,JMXMP,CI,CUSTOM_COMPILATION]");
 		TestGroup.parse("performance, missing");
 	}