db manager: fix syntax error in oracle plugin

Author: jef-n

python/plugins/db_manager/db_plugins/oracle/plugin.py

@@ -32,7 +32,7 @@
 from qgis.PyQt.QtGui import QIcon, QKeySequence
 from qgis.PyQt.QtWidgets import QAction, QApplication, QMessageBox
 
-from qgis.core import QgsApplication QgsVectorLayer, NULL, QgsSettings
+from qgis.core import QgsApplication, QgsVectorLayer, NULL, QgsSettings
 
 from ..plugin import ConnectionError, InvalidDataException, DBPlugin, \
     Database, Schema, Table, VectorTable, TableField, TableConstraint, \