[cordova][xwalk-2427] Add debug step for eclipse case

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Nexus 5]
Unit test result summary: pass 1, fail 0, block 0
[webapi][XWALK-2470] Update 10 cases for SSO

- Fail Reason: the attribute names of IdentityInfo do not follow google spec.

Impacted TCs num(approve): New 0, Update 10, Delete 0
Unit test Platform: Andriod
Unit test result summary: Pass 6, Fail 4, Blocked 0
[webapi][XWALK-2592] Fix bug for webrtc

- Fix bug for webrtc

Impacted tests(designed): new 0, update 1, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 1, fail 0, block 0
Merge pull request #949 from JianfengXu/xujf/2470

[webapi][XWALK-2470] Update 10 cases for SSO
Merge pull request #955 from yunxliu/yunxliu/webapi/webrtc_xwalk2592

[webapi][XWALK-2592] Fix bug for webrtc
Merge pull request #942 from haoxli/haoxli/cordova/xwalk-2427

[cordova][xwalk-2427] Add debug step for eclipse case
[webapi-usecase] Add pluggable step for 48 usecase and remove 28 usecase

- Add pluggable step info for 48 usecase
- Remove 28 usecase beacuase of repeating with demo-express

Impacted tests(approved): new 0, update 48, delete 28
Unit test platform: [IVI]
Unit test result summary: pass 48, fail 0, block 0
[webapi-usecase] Remove 28 usecase items in tests xml files

- Remove usecase items in tests.full.xml, tests.android.xml and tests.tizen.xml
Merge pull request #958 from xinliux/xinliux/usecase/stepinfo

[webapi-usecase] Add pluggable step for 48 usecase and remove 28 usecase
[misc]update xwalkctl to pkgcmd

Impacted TCs num(approved): New 0, update 4, deleted 0
Unit test platform: [tizen]
UT result: Pass:4, Fail 0, block 0
Merge pull request #968 from linshen/shenlin/misc/updatexwalkctl

[misc]update xwalkctl to pkgcmd