Merge pull request #331 from basil/jzlib

Use Java 7 versions of `GZIPInputStream` and `GZIPOutputStream`

Author: jglick

src/main/java/org/jenkinsci/plugins/workflow/log/ConsoleAnnotators.java

@@ -24,8 +24,8 @@
 
 package org.jenkinsci.plugins.workflow.log;
 
-import com.jcraft.jzlib.GZIPInputStream;
-import com.jcraft.jzlib.GZIPOutputStream;
+import java.util.zip.GZIPInputStream;
+import java.util.zip.GZIPOutputStream;
 import hudson.console.AnnotatedLargeText;
 import hudson.console.ConsoleAnnotationOutputStream;
 import hudson.console.ConsoleAnnotator;