Bump version to 3.1.5 (#25)

Author: ctartici

README.md

@@ -36,5 +36,5 @@ You will get a dump of:
 In order to get data about other parts of the cluster (not specific to service mesh) you should run just `oc adm must-gather` (without passing a custom image). Run `oc adm must-gather -h` to see more options.
 
 <!-- 
-Current full version: 3.1.4
+Current full version: 3.1.5
 -->