[webapi] Remove Vehicle info ZonePosition attributes and update VehicleInterface

- Since ZonePosition attributes not exist in Zone according to new spec, So reomve these attributes test
- availabilityChangedListener and removeAvailabilityChangedListener in tizen.vehicle.vehicleSpeed

Impacted TCs num(approved): New 5, Update 2, Delete 19
Unit test Platform: Tizen IVI
Tizen test result summary: Pass 4, Fail 25, Blocked 0
Update pack.py to support string format home folder path.
[webapi]Change ref case type from manual to auto

Impacted tests(approved):new 0,update 102,delete 0
Unit test platform:[Android]
Unit test result summary:pass 67,fail 35,block 0
[usecase-wrt]Change multiuser tcs to approved
[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 13, deleted 0
Unit test platform: [tizen]
Unit test result summary:Pass 13, Fail 0,Block 0
Merge pull request #995 from linshen/shenlin/wrt/update-mutiuser-toapprove

[usecase-wrt]Change multiuser tcs to approved
Merge pull request #990 from yugang/yugang/pack-tool-update

Update pack.py to support string format home folder path.
[webapi] Add webkit prefix due to the status of webkit implementation

- Add '-webkit-' prefix for fiex property based on webkit implementation

Impacted tests(approved): new 0, update 9, delete 0
Unit test platform:[Android][IVI]
Unit test result summary: pass 50, fail 2, block 0

Comment: Test result is the same as upstream result
Merge pull request #994 from kangxu/kangxu/webapi/tct-flexiblebox-css3-tests/updateCases

[webapi] Add webkit prefix due to the status of webkit implementation
Merge pull request #984 from chenxix/chenxi/misc-uiautomation/css-csp-second

[webapi]Change ref case type from manual to auto
Merge pull request #980 from xinliux/xinliux/webapi/vehicleinfo-zone

[webapi] Remove Vehicle info ZonePosition attributes and update VehicleI...