[webapi] Update netinfo manual case name

Impacted Suites: tct-netinfo-w3c-tests
Impacted TCs num: New 0, Update 1, Delete 0
Unit test platform: Tizen(IVI), 
Tizen test result summary: Pass 0, Fail 1, Blocked 0

Fail reason: NetworkInformation.connection attribute does not exist on IVI platform.