Bugfix für urbanairship-java SDK JsonParseExceptionBugfix for urbanairship-java SDK JsonParseException

There (still) exists a bug in urbanairship-java SDK related to parsing valid ISO8601 dates. The original bug report can be found here: GSon date parsing error. The Cause ISO8601 states that for date-time strings the separator “T” can be left out. Unfortunately the urbanairship-java SDK expects only fully qualified ISO8601...