add pid to command result

[d-m-u]

i'm fixing a brakeman warning in system_console about pid = spawn(*command) and i'd like to have command result be able to return the pid

[coveralls]

Coverage remained the same at 100.0% when pulling 2d9b0f2196ac58a110c175265cdc34ff23a11c62 on d-m-u:add_pid_to_command_result into ca555de95ab3dd5cc8cfe9724623b8fd48f647f5 on ManageIQ:master.

[miq-bot]

Checked commit https://github.com/d-m-u/awesome_spawn/commit/2d9b0f2196ac58a110c175265cdc34ff23a11c62 with ruby 2.5.7, rubocop 0.69.0, haml-lint 0.28.0, and yamllint 5 files checked, 2 offenses detected

lib/awesome_spawn.rb

• [ ] :exclamation: - Line 81, Col 14 - Style/SafeNavigation - Use safe navigation (&.) instead of checking if an object exists before calling the method.
• [ ] :exclamation: - Line 83, Col 1 - Layout/EmptyLinesAroundExceptionHandlingKeywords - Extra empty line detected before the rescue.

[kbrock]

Would be nice to merge #32 and this one. since that is from 2015, I think it is time to get it working, or just close it