resource-monitor: Add a body of the dbus request message for applying the change...

resource-monitor: Add a body of the dbus request message for applying the change of enlightenment

Due to the change of enlightenment, the dbus request message should have
a body which includes a string type argument.

For understanding the change of enlightenment, please refer the below commit:

 https://review.tizen.org/gerrit/gitweb?p=platform/upstream/enlightenment.git;a=commit;h=fa89f84645623c0522c1d6327ec60c45648da0af

Change-Id: Ida0553cfd0bb2172ae3145f03d89e53d290b72e7
Signed-off-by: Sung-hun Kim <sfoon.kim@samsung.com>