Enable migrator in offline installer (goharbor#7766)

Signed-off-by: wang yan <[email protected]>

tests/resources/Harbor-Util.robot

@@ -55,7 +55,7 @@ Down Harbor
     Should Be Equal As Integers  ${rc}  0
 
 Package Harbor Offline
-    [Arguments]  ${golang_image}=golang:${GOLANG_VERSION}  ${with_notary}=true  ${with_clair}=true  ${with_migrator}=false  ${with_chartmuseum}=true
+    [Arguments]  ${golang_image}=golang:${GOLANG_VERSION}  ${with_notary}=true  ${with_clair}=true  ${with_migrator}=true  ${with_chartmuseum}=true
     Log To Console  \nStart Docker Daemon
     Start Docker Daemon Locally
     Log To Console  \n\nmake package_offline VERSIONTAG=%{Harbor_Assets_Version} PKGVERSIONTAG=%{Harbor_Package_Version} UIVERSIONTAG=%{Harbor_UI_Version} GOBUILDIMAGE=${golang_image} COMPILETAG=compile_golangimage NOTARYFLAG=${with_notary} CLAIRFLAG=${with_clair} MIGRATORFLAG=${with_migrator} CHARTFLAG=${with_chartmuseum} HTTPPROXY=