Convert o.e.dltk.ruby.debug.tests to JUnit 4. * Convert RubyFilenameLinenumberTests. * Convert AllTests and add missing license header to it. * Dropped unneeded dep from MANIFEST.MF. Change-Id: If2d2456c49ca9e4caf4ccd0ed94f104efd675e65 Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>