[FaceRest::ResourceHandler] Add a member function to check HTTP method
[RestResourceIssueTracker] Use a new function httpMethodIs()
[RestResource*] Use httpMethodIs()
[RestResourceUser] Use httpMethodIs()
[RestResourceHost] Add a blank line to distinguish a scope of a comment
[RestResourceHost] Use m_dataQueryContextPtr instead of using m_userId
[testFaceRestIssueTracker] Add a skeleton of a new test case
[FaceRest] Add missing implementation to get issue trackers
[RestResourceIssueTracker] Add a missing property "baseURL"
[DBClientConfig] Use reference instead of pointer for the first argument of addIssueTracker
[RestResourceIssueTracker] Add implementation of handlePost()
[RestResourceIssueTracker] Use macro to parse POST data
[RestResourceIssueTracker] Don't use empty POST data when an empty property is allowed
[FaceRestTestUtils] Use error code name at assertErrorCode()

Because an error code is hard to recognize the meaning of the error
[testFaceRestIssueTracker] Add a test for adding a record
[testFaceRestIssueTracker] Extract creating test data as utility functions
[testFaceRestIssueTracker] Add tests for some error cases of adding a record
[testFaceRestIssueTracker] Test adding a record without the privilege
[testFaceRestIssueTracker] Remove a needless function
[testFaceRestIssueTracker] Fix a wrong privilege