fixed Content-Length and Content-Range checks

SOL003/VNFSnapshotPackageManagement-API/IndividualVNFSnapshotPackageArtifact.robot

@@ -40,6 +40,7 @@ GET Individual VNF Snapshot Package Artifact - Partial Content
     Check HTTP Response Status Code Is    206
     Check HTTP Content-Type Header Is Set For Package Artifact
     Check HTTP Content-Range Header Is Set
+    Check HTTP Content-Length Header Is Set
     
 GET Individual VNF Snapshot Package Artifact - Range Request Not Supported
     [Documentation]    Test ID: 7.3.8.5.4

SOL003/VNFSnapshotPackageManagement-API/VNFSnapshotPackageContent.robot

@@ -40,6 +40,7 @@ GET VNF Snapshot Package Content - Partial Content
     Check HTTP Response Status Code Is    206
     Check HTTP Content-Type Header Is Set For Package Content
     Check HTTP Content-Range Header Is Set
+    Check HTTP Content-Length Header Is Set
     
 GET VNF Snapshot Package Content - Range Request Not Supported
     [Documentation]    Test ID: 7.3.8.4.4

SOL003/VNFSnapshotPackageManagement-API/VnfSnapshotPackageManagementKeywords.robot

@@ -313,9 +313,15 @@ Check HTTP Content-Type Header Is Set For Package Content
 Check HTTP Content-Range Header Is Set
     Log    Check Content-Range HTTP Header
     Should Contain    ${response['headers']}    Content-Range
-    Should Be Equal As Strings    ${response['headers']['Content-Range']}    ${range}
+    Should Be Equal As Strings    ${response['headers']['Content-Range']}    ${range}/${full_length}
     Log    Header Content-Range is present
 
+Check HTTP Content-Length Header Is Set
+    Log    Check Content-Length HTTP Header
+    Should Contain    ${response['headers']}    Content-Length
+    Should Be Equal As Strings    ${response['headers']['Content-Length']}    ${full_length}
+    Log    Header Content-Length is present
+
 PUT VNF Snapshot Package Content
     log    Trying to perform a PUT. This method should not be implemented
     Set Headers  {"Accept":"${ACCEPT_ZIP}"}  

SOL003/VNFSnapshotPackageManagement-API/environment/variables.txt

@@ -77,7 +77,7 @@ ${artifactPath}    artifactPath
 ${CONTENT_TYPE_OCTET}    application/octet-stream
 ${NFVO_RANGE_OK}    1    # If 1 means that Range is supported by the NFVO
 ${range}          bytes=0-1023
-${full_size}        2000            # Size of the requested artifact to be downloaded via partial downloads
+${full_length}        2000            # Size of the requested artifact to be downloaded via partial downloads
 ${erroneousRange}    bytes=10000000-1000000000    # Requesting a out of range number of bytes
 ${vnfPackageOctetStreamId}    octetStreamPkgId
 ${vnfdOctetStreamId}    octetStreamVnfdId