[STO-744] Patch the MemcacheNode Dispose method

Change-Id: I8728a5ca980b1e7d22860a5abbd384d16ebdea4a
Fix transport disposal test synchronization

bonus: it makes the project tests pass on mono

On mono, send on broken socket does not fail synchronously but fail in
the callback instead. Thus we need to synchronize the UTest to wait for
the end of the callback.

Change-Id: I060b50e83f4f8111533a4f671d0af64d2f60fd91
Nuget restore + travis integration

Change-Id: I255096ccee950c8011a166f9e7fc69d341a518bc
Merge remote-tracking branch 'gerrit/master'

* gerrit/master:
  Nuget restore + travis integration
  Fix transport disposal test synchronization
  [STO-744] Patch the MemcacheNode Dispose method