JOC installer should provide shiro.ini-example

Current Situation

A ./resources/joc/shiro.ini-example is stored by the installer but it is renamed to

• shiro.ini (for release 1.11.0 - 1.12.0) if shiro.ini doesn't exist
• shiro.ini.active (since release 1.12.1, see also JS-1760) if shiro.ini.active doesn't exist

Desired Behavior

A ./resources/joc/shiro.ini-example should not be renamed, but at most copied, so that this example file is always available if you need it as a reset for misconfiguration.