Update Travis to test on JRuby

.travis.yml

 rvm:
   - 1.8.7
   - 1.9.2
+  - jruby
 script: "bundle exec rake clean test"
 gemfile:
   - gemfiles/rails2.gemfile

gemfiles/rails3_1.gemfile.lock

@@ -48,6 +48,8 @@ GEM
     bcat (0.6.1)
       rack (~> 1.0)
     bcrypt-ruby (2.1.4)
+    bcrypt-ruby (2.1.4-java)
+    bouncy-castle-java (1.5.0146.1)
     builder (3.0.0)
     childprocess (0.2.0)
       ffi (~> 1.0.6)
@@ -62,6 +64,7 @@ GEM
     erubis (2.7.0)
     excon (0.6.5)
     ffi (1.0.9)
+    ffi (1.0.9-java)
     fog (0.10.0)
       builder
       excon (~> 0.6.5)
@@ -75,9 +78,14 @@ GEM
     formatador (0.2.0)
     gherkin (2.4.5)
       json (>= 1.4.6)
+    gherkin (2.4.5-java)
+      json (>= 1.4.6)
     hike (1.2.0)
     i18n (0.6.0)
+    jruby-openssl (0.7.4)
+      bouncy-castle-java
     json (1.5.3)
+    json (1.5.3-java)
     mail (2.3.0)
       i18n (>= 0.4.0)
       mime-types (~> 1.16)
@@ -89,6 +97,7 @@ GEM
       net-ssh (>= 1.99.1)
     net-ssh (2.1.4)
     nokogiri (1.5.0)
+    nokogiri (1.5.0-java)
     polyglot (0.3.2)
     rack (1.3.2)
     rack-cache (1.0.2)
@@ -142,6 +151,7 @@ GEM
     xml-simple (1.1.0)
 
 PLATFORMS
+  java
   ruby
 
 DEPENDENCIES