Upgrade Ruby

This change upgrades the required version of Ruby to 1.9.3-p484 due to
a security vulnerability in 1.9.3-p448.

[#61839004]

Merge 59817096-ENETUNREACH to master

[Completes #59817096]

Merge 58809612-properties-launcher to master

[Completes #58809612]

Merge 59134502-rubocop to master

[#59134502]

Merge branch 'code-climate'

Merge 54290822-no-external-connection to master

[Completes #54290822]

Merge 55377304-spring-boot-tar to master

[Completes #55377304]