Use bundle exec for calling the cpi from wrapper
Use bundle exec for calling the cpi from wrapper

The cpi gem is installed with bundler before execution, so if we don't
use bundle exec this wraper won't find it.

[#90633610]

Signed-off-by: Marco Voelz <46e670daac32cff840d1e50cdf9351c443be1923@sap.com>

cloudfoundry-incubator/bosh-vcloud-cpi-release,rexxar-liang/bosh-vcloud-cpi-release,wcamarao/bosh-vcloud-cpi-release,wcamarao/bosh-vcloud-cpi-release,cloudfoundry-incubator/bosh-vcloud-cpi-release,rexxar-liang/bosh-vcloud-cpi-release,rexxar-liang/bosh-vcloud-cpi-release,wcamarao/bosh-vcloud-cpi-release,cloudfoundry-incubator/bosh-vcloud-cpi-release