add port check code for mesos dispatcher

[skonto]

• check port util code
• check if mesos dispather is up. Sometimes dispatcher didnt come up. when run the tests multiple times against the same cluster. Next thing to check is killing the dispatcher etc.

[dragos]

This is pretty old. Any reason why nobody had a look yet?

[dragos]

I'll do it now :)

[dragos]

Except for formatting, it looks good to me. I know this is annoying, but let's try to keep a consistent feel in the code base. A good start is the official Scala code style

[skonto]

i have used http://www.scalastyle.org/ in the past which enforces style (not the official one) and found it really good for code quality and for jenkins reporting. I will fix that.

[dragos]

Lovely! LGTM