Fix Behavior.PluginDefaults

It should check that the library falls back to LCB_IO_OPS_SELECT
without libevent

Change-Id: I932a7b69c6c05bc86f6e82add5c1b8ba28c4d01d
[travis] Output tests results after the build

Change-Id: I7e46af68479e39a488a58150327ee3b785531a05