BUGFIX: agregator: bad encoding conversion when reading from XML

* agregator used outdated functions for string conversions - changed
  U2A/A2U to U2L/L2U.
BUGFIX: extractor: bad encoding conversion when extracting to CSV

* extractor used outdated functions for parameter name strings
  conversions - changed S2A to S2L.
building stable
Merge branch 'master' into devel

Agregator (utils) and extractor (libSzarp2) encoding fixes.