Fixed: bootstrap doesn't handle specific OpenJDK Runtime Environment version

Previously, bootstrap didn't handle some OpenJDK Runtime Environment version as: rhel-2.4.7.1.el6_5-x86_64 u55-b13.
Now it did, the regular expression to catch the version of the jdk was wrong.

Fixes #2113
Merge pull request #2125 from Dogild/bootstrapRegex

Fixed: bootstrap doesn't handle specific OpenJDK Runtime Environment version