cleanup(tse): some minor cleanup (#8)

Author: schwepmo

src/main/java/com/dcaiti/mosaic/app/tse/FxdKernel.java

@@ -109,9 +109,9 @@ public FxdKernel(EventManager eventManager, UnitLogger logger, ConfigT config) {
             this.traversalBasedProcessors.addAll(config.traversalBasedProcessors);
         }
         if (config.timeBasedProcessors != null) {
-            // create registry of time based processors
+            // create registry of time-based processors
             config.timeBasedProcessors.forEach(processor -> {
-                if (processor.triggerInterval >= 0) { // validate that processor has a legal trigger interval
+                if (processor != null && processor.triggerInterval >= 0) { // validate that processor has a legal trigger interval
                     this.timeBasedProcessors.put(processor.getIdentifier(), processor);
                 }
             });

src/main/java/com/dcaiti/mosaic/app/tse/persistence/FcdDatabaseHelper.java

@@ -179,8 +179,8 @@ protected void createTables(boolean isPersistent) throws SQLException {
                 "CREATE TABLE IF NOT EXISTS " + TABLE_RECORDS + " ("
                         + COLUMN_VEH_ID + " TEXT NOT NULL, "
                         + COLUMN_TIME_STAMP + " INTEGER NOT NULL, "
-                        + COLUMN_LATITUDE + " REAL NO NULL, "
-                        + COLUMN_LONGITUDE + " REAL NO NULL, "
+                        + COLUMN_LATITUDE + " REAL NOT NULL, "
+                        + COLUMN_LONGITUDE + " REAL NOT NULL, "
                         + COLUMN_CONNECTION_ID + " TEXT NOT NULL, "
                         + COLUMN_OFFSET + " INTEGER NOT NULL, "
                         + COLUMN_SPEED + " INTEGER NOT NULL, "