Wrong URL in codelist attribute for gmd:LanguageCode

[fxp]

According to INSPIRE MD IR, the value of the codelist attribute for languageCode element should be ​http://www.loc.gov/standards/iso639-2/

<gmd:LanguageCode 
  codeList="http://www.loc.gov/standards/iso639-2/" 
  codeListValue="eng"></gmd:LanguageCode>

• Add this rule in update-fixed-info.xsl
• Add this by default to iso19139 template (if ok for everyone ?)

[fxp]

Committed revision 8528.

[fxp]

Committed revision 8533 for iso19139.fra