Itest/allocate flow

NCL provisioner test, checking that allocateFlow with ToS and Ips creates the correct set of ForwardingRules in the switches. It uses the HTTPMock server.

The HTTPRequest needed to include a new attribute. It's used in the body comparation, in order not to use defined fields name. For example, in flow comparation, we don't want to compare the id's, becuase we are not able to know which one is going to be generated by OpenNaaS. NCL provisioner test, checking that allocateFlow with ToS and Ips creates the correct set of ForwardingRules in the switches. It uses the HTTPMock server.