+ TT#22410 Fix typo in Dockerfile 'Instructions for usage'
In jessie based docker we used lua-unit 3.0-1 while in stretch it is
3.2-1. Newer lua-unit doesn't have setFname and setVerbosity functions.
Instead of setFname we can use --name parameter. setVerbosity(1) is set
by default so we can simply omit it.
Change-Id: Icd01c7b997d8b8567ab43d2bd1220d1824024287
Versions of LuaUnit before version 3.1 would export all assertions
functions to the global namespace
Change-Id: I0bdc03f63acbbe05c49ce10a00e551e60f914b3f