Added code to change site language to match user's preference when they log in and to save default value of English when a new user registers. Also fixed errors in related stored procs and renamed strings.xml (English strings) to strings_en.xml to make it easier to work with in the code. Part of #977
Merge branch 'develop' of gitlab.trommons.org:solas-match into develop
Fixed issue with openid login (when logging in with a new address i.e. new user) related to language preference. Part of #977