[2947] Change severity of log message to ERROR

src/lib/datasrc/client_list.cc

@@ -119,7 +119,7 @@ ConfigurableClientList::configure(const ConstElementPtr& config,
                 // building it in that case.
                 dsrc_pair = getDataSourceClient(type, param_conf);
             } catch (const DataSourceLibraryError& ex) {
-                LOG_WARN(logger, DATASRC_LIBRARY_FAILURE).
+                LOG_ERROR(logger, DATASRC_LIBRARY_ERROR).
                     arg(datasrc_name).arg(rrclass_).arg(ex.what());
                 continue;
             }

src/lib/datasrc/datasrc_messages.mes

@@ -370,7 +370,7 @@ Therefore, the entire data source will not be available for this process. If
 this is a problem, you should configure the zones of that data source to some
 database backend (sqlite3, for example) and use it from there.
 
-% DATASRC_LIBRARY_FAILURE failure loading %1 datasource library for class %2: %3
+% DATASRC_LIBRARY_ERROR failure loading %1 datasource library for class %2: %3
 There was a problem loading the dynamic library for a data source. This
 backend is hence not available, and any data sources that use this
 backend will not be available.