Add more restricted symbols in wiki titles

Headings like "Heading< 1", which are used for creating wiki page title, broke the whole import process.
That's why list of "illegar" title chars was expanded a bit, according to https://www.mediawiki.org/wiki/Manual:Page_title

[4.2.x]

ERM29358

Change-Id: Iff91093e174ab555f5dc3429ba670cf99cb577cc