Added --version to TApplicattion

Included commit hash and architecture

removed mistake

...as the presence of a datasource changes the type of RInterface.

It triggers wrong behaviour of Jenkins parser together with CDash adding ANSI escape symbols: NON-XML-CHAR-0x1B][0m[NON-XML-CHAR-0x1B]

GetSize is deprecated from 3.3
(https://docs.python.org/3/c-api/unicode.html#c.PyUnicode_GetSize) and
the new recommendation is to use PyUnicode_GetLength.

Ensure that variables are actually read from the TTree...

Based on the solution exposed here: https://github.com/root-project/root/commit/9339de9e644b06d5f77607f83aea118969cab7b6

this has been resolved relying on value printing itself for the individual items.