Fix TravisCI about ferret HOT 10 CLOSED

@ziflex, @yiss submitted a PR #35

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@krishnakarthik1309 thank you for your help, finally we can close the issue.

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@ziflex is it only a problem with TravisCi ? have you tried CircleCi ?

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@yiss yep. I haven't tried it.
If it works on CircleCi - I'm fine to use it :)

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@krishnakarthik1309 hey, thanks for your help.
It works now, but it seems that Antlr4 does not generate anything. It just renders list of commands. Probably arguments are not being passed.

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@ziflex As you can see even when I run the antlr4 command from terminal in directory $GOPATH/src/github.com/MontFerret/ferret/pkg/parser it is just giving list of commands. So the problem is not with golang code. Most likely something with antlr4(I am not sure). Try to run this in your system and if it is working then tell me which version of antlr4 you are using.

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It works fine on macOS. Otherwise I wouldn't be able to generate the parser :)

Try via either make generate or go generate ./pkg/...

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Can you show the output of cd pkg/parser and then run antlr4 -Xexact-output-dir -o fql -package fql -visitor -Dlanguage=Go antlr/FqlLexer.g4 antlr/FqlParser.g4

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Sry no need understood the problem.. will try to fix it.

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This PR #37 will fix it by sending arguments to antlr4. You can view current travis-build output here

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