JDK 12 RFR of JDK-8206440: Remove javac -source/-target 6 from jdk regression tests

[joe darcy]

Hello,

With javac support for -source/-target 6 and 1.6 planned to be removed 
later in JDK 12 (JDK-8028563), please review the removal of usage of 
these options in the non-manual jdk regression tests:

     http://cr.openjdk.java.net/~darcy/8206440.0/

Patch below.

Thanks,

-Joe

--- old/test/jdk/java/lang/reflect/OldenCompilingWithDefaults.java 
2018-07-05 20:34:07.084000000 -0700
+++ new/test/jdk/java/lang/reflect/OldenCompilingWithDefaults.java 
2018-07-05 20:34:06.936000000 -0700
@@ -25,7 +25,6 @@
   * @test
   * @bug 8009267
   * @summary Verify uses of isAnnotationPresent compile under older 
source versions
- * @compile -source 1.6 -target 1.6 OldenCompilingWithDefaults.java
   * @compile -source 1.7 -target 1.7 OldenCompilingWithDefaults.java
   * @compile OldenCompilingWithDefaults.java
   */