Update Jacoco to 0.7.9 and move it to the profile

[oleg-nenashev]

Jacoc agent is quite heavy, and I see no reason in running it by default in any Remoting build.
This change moves the agent to an optional profile. It also picks the latest version, so IntellijIDEA is now able to read and show the jacoco.exe report.

@reviewbybees

[oleg-nenashev]

Actually it picks some bits of #194 (though the PR does not seem to be required anymore)

[ghost]

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[oleg-nenashev]

[INFO] --- maven-jar-plugin:3.0.2:jar (default-jar) @ remoting ---
[INFO] Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/maven-archiver/3.1.1/maven-archiver-3.1.1.pom
Oct 30, 2017 2:07:08 PM org.apache.maven.wagon.providers.http.httpclient.impl.execchain.RetryExec execute
INFO: I/O exception (java.net.SocketException) caught when processing request to {s}->https://repo.maven.apache.org:443: Connection timed out (Read failed)
Oct 30, 2017 2:07:08 PM org.apache.maven.wagon.providers.http.httpclient.impl.execchain.RetryExec execute
INFO: Retrying request to {s}->https://repo.maven.apache.org:443

[recampbell]

LGTM

[oleg-nenashev]

@reviewbybees done

[oleg-nenashev]

I am going to ignore the CI issue. The PR builder still needs to be fixed