[PATCH conductor] Update travis-ci config file to match new bundler usage changes in RM 3455

[Richard Su]

https://www.aeolusproject.org/redmine/issues/3455

1. Use Gemfile instead of Gemfile.in.
2. Remove USE_BUNDLER environment variable.
3. Add "--path bundle" to "bundle install"
4. "bundle exec" all rake commands. Not doing so would produce this error:

"You have already activated rake 0.9.2, but your Gemfile requires rake 0.9.2.2.
Using bundle exec may solve this."
---
 .travis.yml |   20 ++++++++++----------
 1 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index d2cdb85..89760fa 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,21 +7,21 @@ env:
   - SUITE=cucumber
   - SUITE=spec
 before_install:
-  - sed s/'pg'/'sqlite3'/ src/Gemfile.in > src/Gemfile
+  - sed s/'pg'/'sqlite3'/ src/Gemfile > src/Gemfile.tmp
+  - mv src/Gemfile.tmp src/Gemfile
 install:
   - cd src 
-  - bundle install
+  - bundle install --path bundle
 before_script:
-  - export USE_BUNDLER=yes
   - cp config/database.sqlite config/database.yml
-  - rake dc:oauth_keys
-  - rake db:drop
-  - rake db:create
-  - rake db:migrate
-  - rake db:seed
-  - rake db:test:prepare
+  - bundle exec rake dc:oauth_keys
+  - bundle exec rake db:drop
+  - bundle exec rake db:create
+  - bundle exec rake db:migrate
+  - bundle exec rake db:seed
+  - bundle exec rake db:test:prepare
 script:
-  - rake $SUITE
+  - bundle exec rake $SUITE
 notifications:
   irc:
     channels:
-- 
1.7.7.6