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 branch '1.5.x'
Improvements to *JavaHome types

Previously the ImmutableJavaHome.do_with() method used the $PWD
qualified version of JAVA_HOME.  This caused problem during some
executions, so both of the *JavaHome types have been changed such that
the fully qualified path is used in the do_with() method.

[#63086152]
Merge 63086152-java-home-improvements

[Completes #63086152]
Temporary change to test spring-cloud based auto-reconfig
Temporary change to test spring-cloud based auto-reconfig