bump versions: jdk, guava, docker-client

I was trying to use 0.0.29 with remote api and it failed on linux:
```Execution default of goal com.spotify:docker-maven-plugin:0.0.29:build failed: Plugin com.spotify:docker-maven-plugin:0.0.29 or one of its dependencies could not be resolved: Could not find artifact de.gesellix:unix-socket-factory:jar:2014-09-26T18-52-33```

So I found: https://github.com/spotify/docker-client/issues/70
I've tried to override docker-client dependency in my pom and got guava incompatibility issue (required version of docker-client 2.7.5 is >=14). So I resorted to docker-maven-plugin modifications and got everything working.

Lets bump versions across the board! :)