Create certificate classes for cxf clients.
Add certificates support to InternalCXFProvider and CXFConfiguration.
Merge branch 'master' of https://github.com/dana-i2cat/mqnaas into feature/cxf-certificates
Close FileInputStream in InternalCXFProvider and add comment.
Merge pull request #60 from adrian-rosello/feature/cxf-certificates

feature/cxf-certificates

Implementation of authentication classes based on certificates for CXF clients.

Pull request includes certificates authentication using JAVA keystores and trustores. The InternalCXFClientProvider has been modified in order to include this information in the generated JAX-RS client.