Release of 1.10.8

• Added a new environment variable, BEAKER_no_fix_interfaces, which
  when set, skips the fix that restarts all virtual host interfaces.
• Parallelized pre-test setup actions that are used across all
  virtual hosts, by using block_on. This speeds up test setup
  for tests that require multiple hosts.
• Added runtime dependency on highline for the inspec reporting.