new testcases and minor bugs fix added

SOL005/NSLifecycleManagement-API/CreateNSInstanceWorkflow.robot

@@ -22,7 +22,7 @@ NS Instance Creation
     Check HTTP Response Status Code Is    201
     Check HTTP Response Header Contains    Location
     Check HTTP Response Body Json Schema Is    NsInstance
-    Check resource not_instantiated    1
+    Check resource not_instantiated
     
 NS Instance Creation with DISABLED Network Service Descriptor
     [Documentation]    Test ID: 5.3.2.18.2

SOL005/NSLifecycleManagement-API/NSLCMOperationKeywords.robot

@@ -1137,6 +1137,6 @@ PUT notification
     Log  Cleaning the endpoint
     Clear Requests  ${callback_endpoint}         
         
-Check LINK in Header
+Check HTTP Response Header Contains Location
     ${linkURL}=    Get Value From Json    ${response['headers']}    $..Link
     Should Not Be Empty    ${linkURL}

SOL005/NSLifecycleManagement-API/Subscriptions.robot

@@ -21,7 +21,6 @@ POST Create a new subscription
     Check HTTP Response Header Contains    Location
     Check HTTP Response Body Json Schema Is    subscription
     
-
 POST Create a new Subscription - DUPLICATION
     [Documentation]    Test ID: 5.3.2.15.2
     ...    Test title: POST Create a new subscription - DUPLICATION
@@ -172,7 +171,7 @@ DELETE subscriptions - Method not implemented
     ...    Reference: Clause 6.4.16.3.5 - ETSI GS NFV-SOL 005 [3] v2.7.1
     ...    Config ID: Config_prod_NFVO
     ...    Applicability: none
-    ...    Post-Conditions: Subscription is not deleted
+    ...    Post-Conditions: none
     DELETE subscriptions
     Check HTTP Response Status Code Is    405
     
@@ -187,7 +186,7 @@ GET Subscriptions as Paged Response
     ...    Post-Conditions: none    
     GET Subscriptions
     Check HTTP Response Status Code Is  200
-    Check LINK in Header
+    Check HTTP Response Header Contains Location
     
 GET subscriptions - Bad Request Response too Big
     [Documentation]    Test ID: 5.3.2.15.15
@@ -198,6 +197,18 @@ GET subscriptions - Bad Request Response too Big
     ...    Config ID: Config_prod_VNFM
     ...    Applicability: none
     ...    Post-Conditions: none 
-     GET Subscriptions
+    GET Subscriptions
     Check HTTP Response Status Code Is    400
-    Check HTTP Response Body Json Schema Is    ProblemDetails
\ No newline at end of file
+    Check HTTP Response Body Json Schema Is    ProblemDetails
+    
+POST Create a new subscription - Unprocessable Entity
+    [Documentation]    Test ID: 5.3.2.15.16
+    ...    Test title: POST Create a new subscription - Unprocessable Entity
+    ...    Test objective: The objective is to test the creation of a new lifecycle management subscription fials when content type of the payload body is supported and the payload body of a request contains syntactically correct data but the data cannot be processed
+    ...    Pre-conditions: none
+    ...    Reference: Clause 6.4.16.3.1 - ETSI GS NFV-SOL 005 [3] v2.7.1
+    ...    Config ID: Config_prod_NFVO
+    ...    Applicability: none
+    ...    Post-Conditions: none     
+    POST subscriptions
+    Check HTTP Response Status Code Is    422
\ No newline at end of file