Upping time for OLT reboot

Change-Id: I8061388c8216cab2f7e5f34be040e71e7d601614
diff --git a/tests/dt-workflow/Voltha_DT_FailureScenarios.robot b/tests/dt-workflow/Voltha_DT_FailureScenarios.robot
index 8e496be..5e620ad 100644
--- a/tests/dt-workflow/Voltha_DT_FailureScenarios.robot
+++ b/tests/dt-workflow/Voltha_DT_FailureScenarios.robot
@@ -164,7 +164,7 @@
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
     END
     # Wait for the OLT to come back up
-    Run Keyword If    ${has_dataplane}    Wait Until Keyword Succeeds    120s    10s
+    Run Keyword If    ${has_dataplane}    Wait Until Keyword Succeeds    360s    10s
     ...    Check Remote System Reachability    True    ${olt_ssh_ip}
     # Waiting extra time for the ONUs to come up
     Sleep    60s
@@ -413,7 +413,7 @@
         ...    ${src['ip']}    ${src['user']}    ${src['pass']}    ${src['container_type']}    ${src['container_name']}
     END
     # Wait for the OLT to come back up
-    Run Keyword If    ${has_dataplane}    Wait Until Keyword Succeeds    120s    10s
+    Run Keyword If    ${has_dataplane}    Wait Until Keyword Succeeds    360s    10s
     ...    Check Remote System Reachability    True    ${olt_ssh_ip}
     # Waiting extra time for the ONUs to come up
     Sleep    60s