fixed issue #162 on v2.6.1

SOL005/NSDManagement-API/NSDManagementKeywords.robot

@@ -190,6 +190,7 @@ GET Individual Network Service Descriptor Information
     GET    ${apiRoot}/${apiName}/${apiVersion}/ns_descriptors/${nsdInfoId}
     ${output}=    Output    response
     Set Suite Variable    ${response}    ${output}
+    Set Suite Variable    ${usageState}    ${response['body']['nsdUsageState']}
 
 Check HTTP Response Body NsdInfo Identifier matches the requested Network Service Descriptor Information
     Log    Going to validate info retrieved
@@ -204,7 +205,6 @@ GET Individual Network Service Descriptor Information with invalid resource iden
     Integer    response status    404
     ${output}=    Output    response
     Set Suite Variable    ${response}    ${output}
-    Set Suite Variable    ${usageState}    ${response['body']['nsdUsageState']}
 
 Send PATCH to disable Individual Network Service Descriptor
     Log    Trying to perform a PATCH. As prerequisite the nsdInfo shall be in enabled operational state