new methods to convert keys to and from String
Service sharing: when the provider uploads files to REST server, provider's public key is included. The key is used later to verify provider's signatures supplied by the consumer.
correct (provider's) public key is uploaded and used also in case of manual installation of service files to domain authority node
service sharing: due to deserialization problems, provider's certificate is uploaded instead of just public key
certificate is uploaded successfully also as URL parameter to HTTP PUT method.
calls to getDomainAuthorityNode() aggregated to a single helper method
Added properties to specify the provider identity. Added instructions to run the tests.
Merge branch 'MitjaPolicyNegotiator' into development