Upgrade commons-codec from 1.12 to 1.15
Upgrade commons-codec from 1.12 to 1.15

Fixes https://issues.apache.org/jira/browse/CODEC-134
igniterealtime/Openfire,akrherz/Openfire,akrherz/Openfire,akrherz/Openfire,guusdk/Openfire,guusdk/Openfire,igniterealtime/Openfire,igniterealtime/Openfire,guusdk/Openfire,igniterealtime/Openfire,akrherz/Openfire,guusdk/Openfire,guusdk/Openfire,igniterealtime/Openfire,akrherz/Openfire