Travis: use more fine-grained tests.

Currently valgrind developer tests are taking about 25 minutes,
with the non-developer valgrind taking 32.

Split into 6 parts and 2 parts respectively.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

.travis.yml

@@ -8,11 +8,15 @@ notifications:
 env:
   - NO_VALGRIND=1 ARCH=32 DEVELOPER=1 COMPILER=gcc
   - NO_VALGRIND=1 ARCH=64 DEVELOPER=1 COMPILER=gcc
-  - NO_VALGRIND=0 ARCH=64 DEVELOPER=0 COMPILER=gcc
+  - NO_VALGRIND=0 ARCH=64 DEVELOPER=0 COMPILER=gcc TEST_GROUP=1 TEST_GROUP_COUNT=2
+  - NO_VALGRIND=0 ARCH=64 DEVELOPER=0 COMPILER=gcc TEST_GROUP=2 TEST_GROUP_COUNT=2
   - NO_VALGRIND=1 ARCH=64 DEVELOPER=1 COMPILER=clang
-  - NO_VALGRIND=0 ARCH=64 DEVELOPER=1 COMPILER=gcc TEST_GROUP=1 TEST_GROUP_COUNT=3
-  - NO_VALGRIND=0 ARCH=64 DEVELOPER=1 COMPILER=gcc TEST_GROUP=2 TEST_GROUP_COUNT=3
-  - NO_VALGRIND=0 ARCH=64 DEVELOPER=1 COMPILER=gcc TEST_GROUP=3 TEST_GROUP_COUNT=3
+  - NO_VALGRIND=0 ARCH=64 DEVELOPER=1 COMPILER=gcc TEST_GROUP=1 TEST_GROUP_COUNT=6
+  - NO_VALGRIND=0 ARCH=64 DEVELOPER=1 COMPILER=gcc TEST_GROUP=2 TEST_GROUP_COUNT=6
+  - NO_VALGRIND=0 ARCH=64 DEVELOPER=1 COMPILER=gcc TEST_GROUP=3 TEST_GROUP_COUNT=6
+  - NO_VALGRIND=0 ARCH=64 DEVELOPER=1 COMPILER=gcc TEST_GROUP=4 TEST_GROUP_COUNT=6
+  - NO_VALGRIND=0 ARCH=64 DEVELOPER=1 COMPILER=gcc TEST_GROUP=5 TEST_GROUP_COUNT=6
+  - NO_VALGRIND=0 ARCH=64 DEVELOPER=1 COMPILER=gcc TEST_GROUP=6 TEST_GROUP_COUNT=6
 
 # Trusty (aka 14.04) is way way too old, so run in docker...
 script: