Fix the issues, found during the testing performed in #1752.

Current List of Issues:

1. CGLib: https://gist.github.com/vam-google/862b1dc2c1badf0e675ef04a552ac872#file-gae_std_java8_test_failure___cglib-txt
2. EasyMock verify not allowed: https://gist.github.com/vam-google/862b1dc2c1badf0e675ef04a552ac872#file-gae_std_java8_test_failure___easymock_verify_not_allowed-txt
3. System Prooperty: https://gist.github.com/vam-google/862b1dc2c1badf0e675ef04a552ac872#file-gae_std_java8_test_failure___env_variable-txt
4. Wierd NoClassDefFound: https://gist.github.com/vam-google/862b1dc2c1badf0e675ef04a552ac872#file-gae_std_java8_test_failure___noclassdeffounderror_serialization_test-txt
5. ThreadManager: https://gist.github.com/vam-google/862b1dc2c1badf0e675ef04a552ac872#file-gae_std_java8_test_failure___threadmanager-txt