Cleanup tests and do better genisoimage/mkisofs detection
Fix some tests and correct bad require
Merge branch 'platform' of github.com:ankurcha/bosh into platform

* 'platform' of github.com:ankurcha/bosh: (26 commits)
  Remove unused sys-filesystem gems from vendor/cache
  Remove sys-filesystem
  Removed sys-filesystem, use sigar Update tests
  Add missing retryable gem to vendor/cache :|
  Lower logging verbosity for tests
  [bosh_agent] fix failing spec
  [release] Fix recursor option in the PowerDNS configuration file
  [fixes #45863605] - don't remove rds or any rds security groups when user opts out of deletion
  fixed typo in microbosh manifest generator
  inline retryable method in common, don't use the gem
  [cli] check_duplicate_keys need to evaluate the yaml as erb before checking
  CloudFoundry system specs invoke VMC boostrap plugin
  update micro bootstrap code to use vpc_config instead of config
  add package cache to ci
  Fix param to micro bosh manifest generator
  [director] modify package cache output
  AG: cf system spec uses route53 outfile
  [bosh_agent] Fix typo error
  [bosh_agent] Fix dhclient3 problem when restarting network
  AG: add route53 input to bat manifest generation in system spec
  ...
Fix logrotate tests
Fix test