Moved to utils for better API structure.

ae103920 · Greg Messner · 27ddced2 · ae103920 · ae103920 · ae103920
Commit ae103920 authored Apr 09, 2017 by Greg Messner
--- a/src/main/java/org/gitlab4j/api/Utils.java
+++ b/src/main/java/org/gitlab4j/api/Utils.java
--- a/src/main/java/org/gitlab4j/api/ISO8601.java
+++ b/src/main/java/org/gitlab4j/api/ISO8601.java
--- a/src/main/java/org/gitlab4j/api/JacksonJson.java
+++ b/src/main/java/org/gitlab4j/api/JacksonJson.java