Define TESTS_ENVIRONMENT in more portable way
Define TESTS_ENVIRONMENT in more portable way

Change-Id: I47913318d6a4b37c720878a1c5e8f5d064a40d09
Reviewed-on: http://review.couchbase.org/28220
Tested-by: Sergey Avseyev <87f6d5e4fd3644c3c20800cde7fd3ad1569370b3@gmail.com>
Reviewed-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

couchbase/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,PureSwift/libcouchbase,couchbase/libcouchbase,uvenum/libcouchbase,signmotion/libcouchbase,signmotion/libcouchbase,trondn/libcouchbase,couchbase/libcouchbase,trondn/libcouchbase,kojiromike/libcouchbase,avsej/libcouchbase,avsej/libcouchbase,kojiromike/libcouchbase,mody/libcouchbase,maxim-ky/libcouchbase,PureSwift/libcouchbase,mnunberg/libcouchbase,couchbase/libcouchbase,signmotion/libcouchbase,avsej/libcouchbase,PureSwift/libcouchbase,senthilkumaranb/libcouchbase,uvenum/libcouchbase,mnunberg/libcouchbase,signmotion/libcouchbase,senthilkumaranb/libcouchbase,senthilkumaranb/libcouchbase,mody/libcouchbase,avsej/libcouchbase,couchbase/libcouchbase,mody/libcouchbase,mnunberg/libcouchbase,couchbase/libcouchbase,trondn/libcouchbase,avsej/libcouchbase,mnunberg/libcouchbase,mody/libcouchbase,kojiromike/libcouchbase,maxim-ky/libcouchbase,PureSwift/libcouchbase,maxim-ky/libcouchbase,uvenum/libcouchbase,trondn/libcouchbase,couchbase/libcouchbase,uvenum/libcouchbase,trondn/libcouchbase,maxim-ky/libcouchbase,senthilkumaranb/libcouchbase,mnunberg/libcouchbase,kojiromike/libcouchbase,uvenum/libcouchbase