Rails 3 is not compatible with Ruby 2.2 : rails/rails#18201

Author: root

Diff for: .travis.yml

@@ -1,6 +1,5 @@
 language: ruby
 rvm:
-  - 2.2.0
   - 2.1.0
   - 2.0.0
 gemfile:
@@ -19,10 +18,17 @@ env:
     - MYSQL_USER=root
     - MYSQL_PASSWORD=
   matrix:
+    include:
+      - rvm: 2.2.0
+        env: REDMINE_VERSION=3.0.0 DATABASE_ADAPTER=mysql
+      - rvm: 2.2.0
+        env: REDMINE_VERSION=3.0.0 DATABASE_ADAPTER=postgresql
+
     - REDMINE_VERSION=3.0.0 DATABASE_ADAPTER=mysql
     - REDMINE_VERSION=3.0.0 DATABASE_ADAPTER=postgresql
     - REDMINE_VERSION=2.6.2 DATABASE_ADAPTER=mysql
     - REDMINE_VERSION=2.6.2 DATABASE_ADAPTER=postgresql
+
     # - REDMINE_VERSION=2.6.1 DATABASE_ADAPTER=mysql
     # - REDMINE_VERSION=2.6.1 DATABASE_ADAPTER=postgresql
     # - REDMINE_VERSION=2.6.0 DATABASE_ADAPTER=mysql