fixed issues #107,111,112

SOL005/NSDManagement-API/IndividualNSDescriptor.robot

@@ -22,7 +22,7 @@ GET Individual Network Service Descriptor Information
     GET Individual Network Service Descriptor Information
     Check HTTP Response Status Code Is    200
     Check HTTP Response Body Json Schema Is   NsdInfo
-    Check HTTP Response Header Contains Etag
+    Check HTTP Response Header Contains ETag
     Check HTTP Response Body NsdInfo Identifier matches the requested Network Service Descriptor Information
 
 GET Individual Network Service Descriptor Information with invalid resource identifier

SOL005/NSDManagement-API/NSDManagementKeywords.robot

@@ -1030,10 +1030,10 @@ Check HTTP Response Header Contains
     Should Contain    ${response['headers']}    ${CONTENT_TYPE}
     Log    Header is present
 
-Check HTTP Response Header Contains Etag
-    Should Contain    ${response['headers']}    Etag
+Check HTTP Response Header Contains ETag
+    Should Contain    ${response['headers']}    ETag
     Log    Header is present
-    Set Suite Variable    ${original_etag}    ${response['headers]['Etag']}
+    Set Suite Variable    ${original_etag}    ${response['headers]['ETag']}
 
 Create Sessions
     Pass Execution If    ${NFVO_CHECKS_NOTIF_ENDPOINT} == 0    MockServer not started as NFVO is not checking the notification endpoint

SOL005/NSLifecycleManagement-API/NSLCMOperationKeywords.robot

@@ -1103,5 +1103,5 @@ PUT notification
     Clear Requests  ${callback_endpoint}         
         
 Check LINK in Header
-    ${linkURL}=    Get Value From Json    ${response.headers}    $..Link
+    ${linkURL}=    Get Value From Json    ${response['headers']}    $..Link
     Should Not Be Empty    ${linkURL}