[build] * stick to jruby-openssl-0.9.5 for the time being
        * only delete bouncycastle gems on clean
        * squashed two integration tests into one
        * allow to run single integration test with mvn -Pmain -Dinvoker.test=integrety
        * obsolete build file
        * extract the osgi and j2ee integration tests into their own profile
        * let travis use those new osgi and j2ee targets