Added config section for compute deployment details

* Added compute section for hypervisor confg. Will need this
  section to define other specifics about environment shortly
* Added compute section to reference configs

Change-Id: I668d5c3cfb2fe1db07b6de7e582c175478fad813

cloudcafe/compute/config.py

@@ -17,6 +17,15 @@ limitations under the License.
 from cloudcafe.common.models.configuration import ConfigSectionInterface
 
 
+class ComputeConfig(ConfigSectionInterface):
+
+    SECTION_NAME = 'compute'
+
+    @property
+    def hypervisor(self):
+        return self.get("hypervisor")
+
+
 class ComputeEndpointConfig(ConfigSectionInterface):
 
     SECTION_NAME = 'compute_endpoint'