Upgrade Java s2i base image to version 2.1
<!-- === Java base image versions for docker, s2i (istag == s2i) -->
<!-- Upstream -->
<version.image.java.upstream.docker>1.3</version.image.java.upstream.docker>
- <version.image.java.upstream.s2i>2.0</version.image.java.upstream.s2i>
+ <version.image.java.upstream.s2i>2.1</version.image.java.upstream.s2i>
<!-- RedHat -->
<version.image.java.redhat.docker>2.0</version.image.java.redhat.docker>
