ConnectionManager: Re-throw initialization errors unless they are MODULE_NOT_FOUND (#5784)

As described in https://github.com/sequelize/sequelize/issues/3302#issuecomment-199238449

lib/dialects/mssql/connection-manager.js

@@ -17,8 +17,11 @@ ConnectionManager = function(dialect, sequelize) {
   try {
   try {
     this.lib = require(sequelize.config.dialectModulePath || 'tedious');
     this.lib = require(sequelize.config.dialectModulePath || 'tedious');
   } catch (err) {
   } catch (err) {
+    if (err.code === 'MODULE_NOT_FOUND') {
       throw new Error('Please install tedious package manually');
       throw new Error('Please install tedious package manually');
     }
     }
+    throw err;
+  }
 };
 };
 
 
 Utils._.extend(ConnectionManager.prototype, AbstractConnectionManager.prototype);
 Utils._.extend(ConnectionManager.prototype, AbstractConnectionManager.prototype);

lib/dialects/mysql/connection-manager.js

@@ -20,8 +20,11 @@ ConnectionManager = function(dialect, sequelize) {
       this.lib = require('mysql');
       this.lib = require('mysql');
     }
     }
   } catch (err) {
   } catch (err) {
+    if (err.code === 'MODULE_NOT_FOUND') {
       throw new Error('Please install mysql package manually');
       throw new Error('Please install mysql package manually');
     }
     }
+    throw err;
+  }
 
 
   this.refreshTypeParser(dataTypes);
   this.refreshTypeParser(dataTypes);
 };
 };

lib/dialects/postgres/connection-manager.js

@@ -23,8 +23,11 @@ ConnectionManager = function(dialect, sequelize) {
     }
     }
     this.lib = sequelize.config.native ? pgLib.native : pgLib;
     this.lib = sequelize.config.native ? pgLib.native : pgLib;
   } catch (err) {
   } catch (err) {
+    if (err.code === 'MODULE_NOT_FOUND') {
       throw new Error('Please install \'' + (sequelize.config.dialectModulePath || 'pg') + '\' module manually');
       throw new Error('Please install \'' + (sequelize.config.dialectModulePath || 'pg') + '\' module manually');
     }
     }
+    throw err;
+  }
 
 
   this.refreshTypeParser(dataTypes.postgres);
   this.refreshTypeParser(dataTypes.postgres);
 };
 };

lib/dialects/sqlite/connection-manager.js

@@ -21,8 +21,11 @@ ConnectionManager = function(dialect, sequelize) {
   try {
   try {
     this.lib = require(sequelize.config.dialectModulePath || 'sqlite3').verbose();
     this.lib = require(sequelize.config.dialectModulePath || 'sqlite3').verbose();
   } catch (err) {
   } catch (err) {
+    if (err.code === 'MODULE_NOT_FOUND') {
       throw new Error('Please install sqlite3 package manually');
       throw new Error('Please install sqlite3 package manually');
     }
     }
+    throw err;
+  }
 
 
   this.refreshTypeParser(dataTypes);
   this.refreshTypeParser(dataTypes);
 };
 };