Added check for mandatory params in setTimeChangeLaunch

:Release Notes:
Checking for availability of mandatory parameters active & parameters.
If not available returns false giving error message.

:Detailed Notes:
Returns the error note if mandatory parameters active & parameters
    are not specified in setTimeChangeLaunch() api.

:Testing Performed:
Compiled locally and tested

:QA Notes:

:Issues Addressed:
[GF-9623] time/setTimeChangeLaunch : Without providing a required
    field i.e Active for  the function its returning true

Open-webOS-DCO-1.0-Signed-off-by: Yasaswini A Y <yasaswini.ay@lge.com>

Change-Id: Ia47a4871a3d56ab7fca06a4c59550d45bab6f683
Reviewed-on: https://g2g.palm.com/3136
Reviewed-by: Build Verification
Reviewed-by: Roger Stringer <roger.stringer@lge.com>
Tested-by: Roger Stringer <roger.stringer@lge.com>