[#2305] Add paver build system.

Problem
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We want to test watchdog on our buildbot... and this needs paver build system


Changes
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Add paver scripts.

I have created a new suite of tests, as the default tests suite fails and when it fails it blocks... so is ugly for buildbot

In the future we can work at improving the official test suite.

The official test suite is wild as it has a lot of untamed threads.

How to test
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reviewers: @alibotean 

check that changes make sense.
done