Fixing issue 105. Fixing SSL version issue. 

This pulls request contains the fix for issue 105.
When communicating with servers like trestles, stampede, lonestar we need to use SSLv3. But by default gram uses TLS and SSL as enabled protocols. Therefore added a flag to enable SSLv3 through API.

According to documentation gss/src/main/java/org/globus/gsi/gssapi/Java_GSI_GSSAPI.html [1] we need to enable SSLv3 using context object.

Please review and let me know if further changes needed to be made.

Thanks
Amila


[1] https://github.com/jglobus/JGlobus/blob/v2.0.6/gss/src/main/java/org/globus/gsi/gssapi/Java_GSI_GSSAPI.html