Handle info fuzzy matches better

If we are calling info, we want one VM. Don't silently discard other
options or try (and fail later) to parse multiple, just say no VM found.

client-cli/cli_lib/vm.py

@@ -35,7 +35,7 @@ from cli_lib.common import call_api
 #
 def vm_info(config, vm):
     """
-    Get information about VM
+    Get information about (single) VM
 
     API endpoint: GET /api/v1/vm/{vm}
     API arguments:
@@ -44,6 +44,11 @@ def vm_info(config, vm):
     response = call_api(config, 'get', '/vm/{vm}'.format(vm=vm))
 
     if response.status_code == 200:
+        if len(response.json()) > 1:
+            # No exact match; return not found
+            return False, "VM not found."
+        else:
+            return True, response.json()[0]
         return True, response.json()
     else:
         return False, response.json()['message']