FreeSWITCH2

Merge pull request #1800 in FS/freeswitch from bugfix/FS-12001-mod_callcenter-can-t-use-mod_mariadb-with-mysql-due-to-keyword-on-table-schema to master

* commit '71b0ab24b1af10477369047149b158579b31016b':
  FS-12001: [mod_callcenter] Workaround issues with renaming tables and columns in SQLite version prior to 2019-02-07 (3.27.0).