Allow shared libs to be loaded using literal filenames as well as original inferred style

Due to the packaging rules of some Linux distros such as Fedora and RHEL, the .so libs for an Axis2/C component might only be available in a devel version of an Axis2/C package. It would be desirable to have flexibility in the Axis2/C config to actually refer to the relative filename from a runtime package.

For example:

<messageReceiver class="libwsf_cpp_msg_recv.so.0"/>