Update .travis.yml

move triggers from 1st conf. to 4th conf to balance loads
[skip ci]

.travis.yml

@@ -17,9 +17,6 @@ env:
      TESTCOV_TOOL=gcov-4.8
      USE_TCMALLOC=TRUE
      DROPBOX=TRUE
-     TRIGGER_BB=TRUE
-     TRIGGER_OSX=TRUE
-     TRIGGER_WINDOWS=TRUE
      MEMCHECK=TRUE
      PUSH_TO_CDASH=TRUE
    - CMAKE_CXX_COMPILER=g++-4.8
@@ -33,6 +30,9 @@ env:
      PUSH_TO_CDASH=TRUE
    - CMAKE_CXX_COMPILER=g++-4.8
      CMAKE_BUILD_TYPE=DEBUG
+     TRIGGER_BB=TRUE
+     TRIGGER_OSX=TRUE
+     TRIGGER_WINDOWS=TRUE
      USE_TCMALLOC=TRUE
    - CMAKE_CXX_COMPILER=clang++-3.3
      CMAKE_BUILD_TYPE=RELEASE