Set more appropriate timeouts for basic & dcp tests
Set more appropriate timeouts for basic & dcp tests

As seen on valgrind enabled tests, test time for basic tests
are as follows:
ep-engine_full_eviction_basic .......... Passed 425.09 sec
ep-engine_basic_tests .................. Passed 433.73 sec

- Increasing the timeout for these tests from 400 to 600, so
that they may complete when run with valgrind.
- Also reducing the timeout for dcp tests from 1800 to 1200.

Change-Id: Ie2aa79a56e56bbe84a8dca5f1819921509331b58
Reviewed-on: http://review.couchbase.org/59116
Tested-by: buildbot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>

daverigby/kv_engine,daverigby/ep-engine,teligent-ru/ep-engine,couchbase/ep-engine,couchbase/ep-engine,owendCB/ep-engine,membase/ep-engine,owendCB/ep-engine,couchbase/ep-engine,daverigby/kv_engine,daverigby/kv_engine,teligent-ru/ep-engine,teligent-ru/ep-engine,membase/ep-engine,hisundar/ep-engine,membase/ep-engine,hisundar/ep-engine,daverigby/ep-engine,daverigby/ep-engine,owendCB/ep-engine,daverigby/kv_engine,membase/ep-engine,hisundar/ep-engine,hisundar/ep-engine,daverigby/ep-engine,owendCB/ep-engine,teligent-ru/ep-engine,couchbase/ep-engine