Docker build file for a1 mediator

Provide docker build file for a1 mediator.
Also fixes the test cases.

Issue-ID: RIC-831
Signed-off-by: subhash kumar singh <subh.singh@samsung.com>
Change-Id: I60aed9a85ea3bb9b9085bdc3016fc9f277cec139
diff --git a/a1-go/cmd/a1.go b/a1-go/cmd/a1.go
index 2ec0d7b..cdb44cb 100644
--- a/a1-go/cmd/a1.go
+++ b/a1-go/cmd/a1.go
@@ -32,6 +32,9 @@
 	// os.Setenv("DBAAS_SERVICE_HOST", "xxxxx")
 	// os.Setenv("DBAAS_SERVICE_PORT", "xxxxx")
 
+       // initialize logger
+       a1.Init()
+
 	// start restful service to handle a1 api's
 	restful := restful.NewRestful()