Add query params to reqest for VertxClientHttpEngine

[tylerscoville]

This pr pulls in a subset of changes from #2890

The changes are

• Add query params to uri if they exist
• Dont add USER_AGENT header if one already exists

https://issues.redhat.com/browse/RESTEASY-3018

[wildfly-ci]

Hello, tylerscoville. I'm waiting for one of the admins to verify this patch with /ok-to-test in a comment.

[jamezp]

Thank you @tylerscoville!

We require all contributions to be made under the terms of the ASL 2.0 License: http://www.apache.org/licenses/LICENSE-2.0
Do you agree to these terms?

Also WRT to the PR, it looks like an mvn clean compile wasn't done or the formatting was skipped. Could you run that to let the formatter run and amend the commit?

[jamezp]

/ok-to-test

[tylerscoville]

@jamezp Thanks for getting back so fast.

I agree to the terms.

I also ran mvn clean compile and amended the commit.

[jamezp]

The TCK failure is known and nothing to worry about.

[jamezp]

Thank you @tylerscoville