[webapi] Update cases for Network Information API

- New Spec: http://w3c.github.io/netinfo

Impacted tests(approved): new 2, update 1, delete 11
Unit test platform: [Android]
Unit test result summary: pass 2, fail 2, block 0

Comment: type and downlinkMax don't exist in NetworkInformation,
but as spec describe, 2 attributes should exist
Remove username from branch name as GitHub will add it automatically

when make a pull request from a forked repo.
This also satisfies @bspencer curiosity at
https://lists.crosswalk-project.org/pipermail/crosswalk-dev/2014-October/002162.html
Merge pull request #1116 from zqzhang/readme-username-remove

Remove username from branch name as GitHub will add it automatically
[webapi][XWALK-1292] Remove tests due to storage may nerver change
Merge pull request #1125 from kangxu/kangxu/tct-filesystem-tizen-tests/removeCases

[webapi][XWALK-1292] Remove tests due to storage may nerver change
[webapi][XWALK-1291] Update tests to fix issue

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [IVI]
Unit test result summary: pass 1, fail 0, block 0
Merge pull request #1122 from kangxu/kangxu/webapi/tct-filesystem-tizen-tests/updateCases

[webapi][XWALK-1291] Update tests due to change test point
[webapi] Remove 7 cases due to spec update for WebRTC API

- Spec: http://www.w3.org/TR/webrtc
Merge pull request #1104 from kangxu/kangxu/webapi-webrtc-w3c-tests/updateCases

[webapi] Remove 7 cases for spec update for WebRTC API
[webapi] Update upstream tests for audio and video

Impacted tests(approved): new 15, update 6, delete 0
Unit test platform:[Android][IVI]
Unit test result summmary: pass 12, fail 9, block 0

W3C Test Path: html/semantics/embedded-content/media-elements/user-interface/muted.html

Comment: XWALK-970
Merge pull request #1108 from kangxu/kangxu/webapi/tct-audio-html5-tests/update

[webapi] Update upstream tests  for audio and video
[webapi] Remove 2 tests due to spec update for rawsockets

Spec Link: http://www.w3.org/TR/raw-sockets/
Merge pull request #1040 from kangxu/kangxu/webapi/tct-netinfo-w3c-tests/update

[webapi] Update tests for Network Information API to align with Chromium implementation
Merge pull request #1129 from kangxu/kangxu/webapi/webapi-rawsockets-sysapps-tests/updateCases

[webapi] Remove 2 tests due to spec update for rawsockets