New compiler warning in `org.eclipse.jdt.internal.core.builder.ClasspathJar`

[srikanth-sankaran]

After commit db3e9da made for #4826, we get a new compiler warning while compiling org.eclipse.jdt.internal.core.builder.ClasspathJar saying Unnecessary $NON-NLS$ tag in the line:

String releasePath = Util.METAINF_VERSIONS + this.compliance + '/' + IModule.MODULE_INFO_CLASS; //$NON-NLS-1$

[srikanth-sankaran]

RC1 may already be prepared so resetting milestone to RC2, but given the nature of the fix it shouldn't really matter