javapackager clean up JDK 9 test suite

1. Remove property "other.jre" from Config.java as it is not used in JDK9.
2. Fix faling testcase FileAssociationTest in mac.
3.Remove unnecessary check
if (ExtensionType.NormalJar == intermediate) {..}

in MainClassTest.java and UnNamedModuleDependsOnOtherJarsTest.java

4. Remove All metadata which was miscommitted to repository.

5. skip test file "com.oracle.appbundlers.tests.functionality.jdk9test.SecondaryLauncherNormalAndModularMixTest" until bug https://bugs.openjdk.java.net/browse/JDK-8171959 is fixed.