Managers bmc & bmc time script fix

1. redfish/managers/test_managers_bmc.robot
   Made the following changes
   - In Verify boot count after reboot test case, store the
     initial state of NTP/ProtocolEnabled.
   - Set NTP/ProtocolEnabled to TRUE.
   - In Teardown restore the NTP to initial state.
This is been done since the test case fails when NTP is disabled.

2. redfish/managers/test_managers_bmc_time.robot
   - In Verify Enable NTP test case, while checking the service sync
     status for systemd-timesyncd, added a wait time of 1 min.
This is done since after Redfish NTP Patch to Enabled state,
the service status gets updated after some time which causes
test script failure.

Tested: Run robot redfish/managers/test_managers_bmc.robot
        Run robot redfish/managers/test_managers_bmc_time.robot

Signed-off-by: Aravinth R <aravinthr@ami.com>
Change-Id: I1d7e1a0189e4d0030e58062b0bf93e8e5c9b47bb
diff --git a/redfish/managers/test_managers_bmc_time.robot b/redfish/managers/test_managers_bmc_time.robot
index 89b9f49..6be2fa7 100644
--- a/redfish/managers/test_managers_bmc_time.robot
+++ b/redfish/managers/test_managers_bmc_time.robot
@@ -154,7 +154,7 @@
     # The following patch command should set the ["NTP"]["ProtocolEnabled"] property to "True".
     Redfish.Patch  ${REDFISH_NW_PROTOCOL_URI}  body={'NTP':{'ProtocolEnabled': ${True}}}
     ...  valid_status_codes=[${HTTP_OK}, ${HTTP_NO_CONTENT}]
-    Wait Until Keyword Succeeds  30 sec  5 sec
+    Wait Until Keyword Succeeds  1 min  5 sec
     ...  Verify System Time Sync Status  ${True}
     ${ntp}=  Redfish.Get Attribute  ${REDFISH_NW_PROTOCOL_URI}  NTP
     Rprint Vars  ntp