(maint) Use bundler retries for PR testing
(maint) Use bundler retries for PR testing

To avoid transient errors with bundler, we can use the --retry argument to
retry attempts at downloading gemfiles & git repos during bundle install.

Signed-off-by: Ken Barber <470bc578162732ac7f9d387d34c4af4ca6e1b6f7@bob.sh>

mullr/puppetdb,waynr/puppetdb,highb/puppetdb,wkalt/puppetdb,kbrezina/puppetdb,johnduarte/puppetdb,ajroetker/puppetdb,puppetlabs/puppetdb,rbrw/puppetdb,mullr/puppetdb,kbarber/puppetdb,senior/puppetdb,highb/puppetdb,shrug/puppetdb,senior/puppetdb,puppetlabs/puppetdb,grimradical/puppetdb,johnduarte/puppetdb,rbrw/puppetdb,kbrezina/puppetdb,kbarber/puppetdb,highb/puppetdb,rbrw/puppetdb,ajroetker/puppetdb,ajroetker/puppetdb,ajroetker/puppetdb,puppetlabs/puppetdb,wkalt/puppetdb,puppetlabs/puppetdb,grimradical/puppetdb,mullr/puppetdb,puppetlabs/puppetdb,mullr/puppetdb,johnduarte/puppetdb,grimradical/puppetdb,johnduarte/puppetdb,kbrezina/puppetdb,senior/puppetdb,shrug/puppetdb,kbarber/puppetdb,highb/puppetdb,kbrezina/puppetdb,wkalt/puppetdb,waynr/puppetdb,shrug/puppetdb,rbrw/puppetdb,shrug/puppetdb,waynr/puppetdb,wkalt/puppetdb,grimradical/puppetdb,kbarber/puppetdb,rbrw/puppetdb,senior/puppetdb,mullr/puppetdb,waynr/puppetdb