ipatests: wait for sssd-kcm to settle after date change

In order to expire the ACME cert, system is moved and while
issuing the kinit command, results into failure.

Hence run kinit command repeatedly untill things get settle.

This patch removes the sleep and adds tasks.run_repeatedly()
method instead.

Signed-off-by: Mohammad Rizwan <myusuf@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>

ipatests/test_integration/test_acme.py

@@ -602,21 +602,20 @@ def issue_and_expire_acme_cert():
             tasks.kdestroy_all(host)
             tasks.move_date(host, 'stop', '+90days+60minutes')
 
-        time.sleep(10)
         tasks.get_kdcinfo(host)
         # Note raiseonerr=False:
         # the assert is located after kdcinfo retrieval.
-        result = master.run_command(
-            "KRB5_TRACE=/dev/stdout kinit admin",
+        # run kinit command repeatedly until sssd gets settle
+        # after date change
+        tasks.run_repeatedly(
+            host, "KRB5_TRACE=/dev/stdout kinit admin",
             stdin_text='{0}\n{0}\n{0}\n'.format(
-                master.config.admin_password
-            ),
-            raiseonerr=False
+                host.config.admin_password
+            )
         )
         # Retrieve kdc.$REALM after the password change, just in case SSSD
         # domain status flipped to online during the password change.
         tasks.get_kdcinfo(host)
-        assert result.returncode == 0
 
     yield _issue_and_expire_acme_cert