tests: drop redundant TLS live migration tests

Drop four of the eight TLS encrypted live migrations in
live_migration_tls test, because they consume a lot of time without
adding any coverage.

On-behalf-of: SAP [email protected]
Signed-off-by: Sebastian Eydam <[email protected]>

Author: amphi

tests/testscript.py

@@ -1404,8 +1404,6 @@ def test_live_migration_tls(self):
         for parallel in [True, False]:
             for dst_host, dst, src in [
                 ("192.168.100.2", computeVM, controllerVM),
-                ("192.168.100.1", controllerVM, computeVM),
-                ("computeVM", computeVM, controllerVM),
                 ("controllerVM", controllerVM, computeVM),
             ]:
                 # To check for established TLS connections, we count the number