[wrt] Remove manual cases compare with auto cases in 5 suites
[wrt][XWALK-1886] fix-xwalk-1886

Change assert_true() to async_test()
Impacted TCs num(approved): New 0, update 2, deleted  0
Unit test platform: [tizen]
Unit test result summary: Pass 2 , Fail  0, Blocked 0
[wrt][XWALK-1540]Fix XWALK-1540 update tcs for wrt-rtcore-tizen-tests

Impacted TCs num: New 0, Update 1, Delete 0
Unit test PLatform: [Tizen]
Tizen test result summary: Pass 1, Fail 0
[behavior][misc][XWALK-1691][XWALK-1811]Fix XWALK-1691/1811

Impacted TCs num(approved): New 0, update 2, deleted 1
Unit test platform: [tizen]
Unit test result summary: Pass 2 , Fail 0, Blocked  0
[misc] Collect 154 manual tests which can be created reference files

- Remove executable mode from *.htm* files
- Remove trailing spaces from *.htm* files
[misc] Add a usecase for content

- Fail reason: when input different parameter of directoryId, the content.find() method return same file list.
- Fail reason: when delete file on the device, content.find() also return the old file list.

Impacted TCs num(approved): New 1, Update 0, Delete 0
Unit test Platform: [Tizen IVI]
Test result summary: Pass 0, Fail 1, Blocked 0
Merge pull request #308 from kangxu/kangxu/wrt/wrt-rtbin-tizen-tests/removeManualCases

[wrt] Remove manual cases compare with auto cases in 5 suites
Merge pull request #313 from linshen/fix-xwalk-1540

[wrt][XWALK-1540]Fix XWALK-1540 update tcs for wrt-rtcore-tizen-tests
Merge pull request #309 from linshen/fix-xwalk-1886

[wrt][XWALK-1886] fix-XWALK-1886 update tct-rt01-wrt-tests
Merge pull request #317 from linshen/fix-xwalk-1691/1811

[behavior-misc][XWALK-1691][XWALK-1811]Fix XWALK-1691/1811
Merge pull request #319 from JianfengXu/xujf/misc/content

[misc] Add a usecase for content