Change default time mode/owner to MANUAL/BOTH

OPAL gets error on setting host time because the default time mode/owner
is NTP/BMC, which disallows host to set its time.
As discussed and requested by OPAL, change the default time mode/owner
to MANUAL/BOTH.

Change-Id: Ide55f970b66f3025f67ad2ef093a74a3c8f8b8ea
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/epoch_base.hpp b/epoch_base.hpp
index f31a32b..fedaeb6 100644
--- a/epoch_base.hpp
+++ b/epoch_base.hpp
@@ -38,10 +38,10 @@
         sdbusplus::bus::bus& bus;
 
         /** @brief The current time mode */
-        Mode timeMode = Mode::NTP;
+        Mode timeMode = Mode::MANUAL;
 
         /** @brief The current time owner */
-        Owner timeOwner = Owner::BMC;
+        Owner timeOwner = Owner::BOTH;
 
         /** @brief Set current time to system
          *