[Axis2] Guththila needs to define a set of error returns

[Samisa Abeysinghe]

At the moment, it guththila returns -1 on all errors, however we may 
need more comprehensive error returns to be more specific on the kind of 
error.
Axis Axis2C we havee:
https://svn.apache.org/repos/asf/webservices/axis2/trunk/c/include/axis2c_errno.h
Well, we difne our error number space relative to APR as we use APR, but 
guththila may need not do that.

Thanks,
Samisa...