TDQ-9689 tMultiPatternCheck reject message cannot be a context variable.
1) use the value of context instead of the key in the output message
2) handle \ and " correctly in the output message
Merge branch '5.6'
Merge pull request #88 from xqliu-talend/master

TDQ-9689 tMultiPatternCheck reject message cannot be a context variable.
Merge branch 'master' into feature/SCM-239/mavenstudiobuild