Let's try installing vagrant this way

Signed-off-by: Clinton Wolfe <clintoncwolfe@gmail.com>

.travis.yml

@@ -8,8 +8,7 @@ addons:
       - chefdk
 
 # Don't `bundle install` which takes about 1.5 mins
-# install: echo "skip bundle install"
-install: bundle install
+install: echo "skip bundle install"
 
 branches:
   only:
@@ -25,6 +24,7 @@ before_install:
 - chef --version
 - cookstyle --version
 - foodcritic --version
+- cd /tmp && curl -O https://releases.hashicorp.com/vagrant/2.2.6/vagrant_2.2.6_linux_amd64.zip && unzip vagrant_2.2.6_linux_amd64.zip && mv vagrant /usr/bin/ && vagrant --version
 
 matrix:
   include: