[qe] fix check for condition for a starting cluster behind proxy

A condition to ensure the state of the cluster after starting it behind a proxy was introduce in 4a9a35b that check is using a function which relies on the shell instance but that instance is not initialize anywhere as so the check is failing with an error showing shell instance is not initialize. This commit initialize the instance and now the check is working as expected

Signed-off-by: Adrian Riobo Lorenzo <ariobolo@redhat.com>

test/integration/testsuite_test.go

@@ -63,6 +63,10 @@ var _ = BeforeSuite(func() {
 	err = util.RemoveCRCConfig()
 	Expect(err).NotTo(HaveOccurred())
 
+	// start shell instance
+	err = util.StartHostShellInstance("")
+	Expect(err).NotTo(HaveOccurred())
+
 	// set credPath
 	credPath = filepath.Join(userHome, ".crc", "machines", "crc", "id_rsa")