[webapi] Add 31 TCs for devicecapabilities

    Impacted Suites: webapi-devicecapabilities-sysapps-tests
    Impacted TCs num: New 31, Update 0, Delete 0
    Unit test Platform: Tizen
    Tizen test result summary: Pass 5, Fail 24, Blocked 2
    
    Comments:
    1. 24 TCs failed due to the reason that attributes are not readonly
    2. 2 TCs can not be executed in ivi platform.