SOL002 VNF Lifecycle Management - Implementation of deltas between v3.3.1 and v2.7.1

This merge request refers to the implementation of deltas between v3.3.1 and v2.7.1 of SOL002 VNF LCM Interface.

@lynchpi @aelken @matsuurat @carignani @sayama @kraja @zulfiqar @zafar

**Deadline for review: Wednesday 3rd March 2021 @6pm CET

Review period elapsed: approved**

SOL002/VNFLifecycleManagement-API/VnfLcmOperationKeywords.robot

@@ -11,8 +11,8 @@ Library    Collections
 Library    JSONSchemaLibrary    schemas/
 Library    String
 Library    Process
-Variables    descriptors/SOL001/VNFD/vnfd_SOL001.yaml
-Variables    descriptors/SOL006/VNFD/vnfd_SOL006.yaml
+#Variables    descriptors/SOL001/VNFD/vnfd_SOL001.yaml
+#Variables    descriptors/SOL006/VNFD/vnfd_SOL006.yaml
 
 *** Keywords ***
 Create Sessions 
@@ -1455,6 +1455,7 @@ PARSE the Descriptor File
     Run Keyword If  '${descriptorType}'=='SOL001'    Fetch Information from SOL001 descriptor file    ELSE    Fetch Information from SOL006 descriptor file
     
 Fetch Information from SOL001 descriptor file
+    Import Variables    ${CURDIR}/descriptors/SOL001/VNFD/vnfd_SOL001.yaml
     @{VDU_labels}=    Create List
     @{VNF_labels}=    Create List
     @{VirtualLink_labels}=    Create List
@@ -1482,6 +1483,7 @@ Fetch Information from SOL001 descriptor file
 
 Get VNF Attributes from SOL001
     [Arguments]    ${VNF_label}
+    Import Variables    ${CURDIR}/descriptors/SOL001/VNFD/vnfd_SOL001.yaml
     ${descriptor_id}=    Get Variable Value    ${topology_template.node_templates.${VNF_label}.properties.descriptor_id}
     ${provider}=    Get Variable Value    ${topology_template.node_templates.${VNF_label}.properties.provider}
     ${product_name}=    Get Variable Value    ${topology_template.node_templates.${VNF_label}.properties.product_name}
@@ -1497,6 +1499,7 @@ Get VNF Attributes from SOL001
     Set Global Variable    ${Flavour_ID}    ${flavour_id}
 
 Fetch Information from SOL006 descriptor file
+    Import Variables    ${CURDIR}/descriptors/SOL006/VNFD/vnfd_SOL006.yaml
     ${descriptor_id}=    Get Variable Value    ${nfv.vnfd[0].id}
     ${provider}=    Get Variable Value    ${nfv.vnfd[0].provider}
     ${product_name}=    Get Variable Value    ${nfv.vnfd[0]['product-name']}
@@ -1524,6 +1527,7 @@ Fetch Information from SOL006 descriptor file
 
 Get VDU IDs
     [Arguments]    ${count}    
+    Import Variables    ${CURDIR}/descriptors/SOL006/VNFD/vnfd_SOL006.yaml
     @{VDU_labels}=    Create List
     ${Storage_labels}=    Create List
     FOR    ${i}    IN RANGE    ${count}
@@ -1536,6 +1540,7 @@ Get VDU IDs
             
 Get Internal CPs for each VDU
     [Arguments]    ${vdu}
+    Import Variables    ${CURDIR}/descriptors/SOL006/VNFD/vnfd_SOL006.yaml
     ${count}=    Get Length    ${nfv.vnfd[0].vdu[${vdu}]['int-cpd']}    
     ${internal_CPs}=    Create List
     FOR    ${i}    IN RANGE    ${count}
@@ -1545,6 +1550,7 @@ Get Internal CPs for each VDU
     
 Get External CP IDs
     [Arguments]    ${count}    
+    Import Variables    ${CURDIR}/descriptors/SOL006/VNFD/vnfd_SOL006.yaml
     @{external_CPs}=    Create List
     FOR    ${i}    IN RANGE    ${count}
         Append To List    ${external_CPs}    ${nfv.vnfd[0]['ext-cpd'][${i}]['id']} 
@@ -1553,6 +1559,7 @@ Get External CP IDs
 
 Get Virtual Link IDs
     [Arguments]    ${count}    
+    Import Variables    ${CURDIR}/descriptors/SOL006/VNFD/vnfd_SOL006.yaml
     ${VirtualLink_labels}=    Create List
     FOR    ${i}    IN RANGE    ${count}
         Append To List    ${VirtualLink_labels}    ${nfv.vnfd[0]['int-virtual-link-desc'][${i}]['id']} 
@@ -1561,6 +1568,7 @@ Get Virtual Link IDs
 
 Get Instantiation Levels
     [Arguments]    ${count}
+    Import Variables    ${CURDIR}/descriptors/SOL006/VNFD/vnfd_SOL006.yaml
     @{Instantiation_Levels}=    Create List
     FOR    ${i}    IN RANGE    ${count}
         Append To List    ${Instantiation_Levels}    ${nfv.vnfd[0].df['instantiation-level'][${i}]['id']}