Bump jruby 1.7.17

Author: cpuguy83

1.7/Dockerfile

@@ -1,5 +1,5 @@
 FROM java:8
-ENV JRUBY_VERSION 1.7.16.2
+ENV JRUBY_VERSION 1.7.17
 RUN mkdir /opt/jruby \
   && curl http://jruby.org.s3.amazonaws.com/downloads/${JRUBY_VERSION}/jruby-bin-${JRUBY_VERSION}.tar.gz \
   | tar -zxC /opt/jruby --strip-components=1 \

1.7/onbuild/Dockerfile

@@ -1,4 +1,4 @@
-FROM jruby:1.7.16
+FROM jruby:1.7
 
 RUN mkdir -p /usr/src/app
 WORKDIR /usr/src/app