Use parallelism on travis and reorder bots (#1802)

Author: jcollins-g

.travis.yml

@@ -1,14 +1,14 @@
 language: dart
 sudo: false
 dart:
-  - "dev/raw/latest"
   - stable
+  - "dev/raw/latest"
 env:
-  - DARTDOC_BOT=main
-  - DARTDOC_BOT=packages
   - DARTDOC_BOT=flutter
-  - DARTDOC_BOT=sdk-docs
   - DARTDOC_BOT=sdk-analyzer
+  - DARTDOC_BOT=main
+  - DARTDOC_BOT=sdk-docs
+  - DARTDOC_BOT=packages
 script: ./tool/travis.sh
 
 os:

tool/grind.dart

@@ -40,7 +40,7 @@ final String defaultPubCache =
 /// Run no more than the number of processors available in parallel.
 final MultiFutureTracker testFutures = new MultiFutureTracker(
     Platform.environment.containsKey('TRAVIS')
-        ? 1
+        ? 2
         : Platform.numberOfProcessors);
 
 // Directory.systemTemp is not a constant.  So wrap it.