[connman] Clean up wakeup timer unit test

Use stubs instead of actual IPHB implementation, so that the unit test
can be run successfully also in the development environment.
Merge pull request #130 from hmallat/wakeup-timer-unit-test-cleanup

[connman] Clean up wakeup timer unit test
gsupplicant: Add property calls to property_calls list

Although the logic for handling property call list was available, the
property call list was not being populated.
Merge pull request #131 from hmallat/upstream-property-call-list-fix

gsupplicant: Add property calls to property_calls list