Change detect output

Previously, the detect output of the buildpack looked something like
the following:

openjdk-1.7.0_40, tomcat-7.0.42, spring-auto-reconfiguration-0.9.1

Per request from the Cloud Foundry core team, this output has been
modified to delimit each entry's name and version number with an
equals sign and each entry from one another with a space.  The output
now looks like:

openjdk=1.7.0_40 tomcat=7.0.42 spring-auto-reconfiguration=0.9.1

[#58810508]
Merge 58810508-detect-output to master

[Completes #58810508]