Update robot case to debug the issue got in nightly test (#5576)

This commit updates the "Sign In Harbor" robot case by adding debug information when it failed

tests/resources/Harbor-Pages/HomePage.robot

@@ -26,6 +26,7 @@ Sign In Harbor
     Sleep  5
     ${title}=  Get Title
     Log To Console  ${title}
+    Run Keyword If  "${title}" != "Harbor"  Capture Screenshot And Source  ELSE  Log  The title is Harbor
     Should Be Equal  ${title}  Harbor
     Sleep  2
     Input Text  login_username  ${user}
@@ -36,6 +37,10 @@ Sign In Harbor
     Log To Console  ${user}
     Wait Until Page Contains  ${user}
 
+Capture Screenshot And Source
+    Capture Page Screenshot
+    Log Source
+
 Sign Up Should Not Display
     Page Should Not Contain Element  xpath=${sign_up_button_xpath}