Optimized database resets for local testing

- we've had an optimization in CI that copies a fresh SQLite DB to a
  file, and copies it back when we need to do a DB reset
- I originally only let this run in CI but we've had it around for a
  while so we should GA it to run on local machines
- there may be edge cases, but we should fix them instead of letting
  tests run slower for development
- this also makes sure we clean up any existing files before
  initializing the DB

ghost/core/test/utils/db-utils.js

@@ -16,7 +16,7 @@ const schemaTables = Object.keys(schema);
 // Other Test Utilities
 const urlServiceUtils = require('./url-service-utils');
 
-const dbHash = Date.now();
+let dbInitialized = false;
 
 /**
  * Checks if the current active connection is a MySQL database
@@ -43,21 +43,23 @@ module.exports.isSQLite = () => {
  * @param {Boolean} options.truncate whether to truncate rather thann fully reset
  */
 module.exports.reset = async ({truncate} = {truncate: false}) => {
-    // Only run this copy in CI until it gets fleshed out
-    if (process.env.CI && module.exports.isSQLite()) {
+    if (module.exports.isSQLite()) {
         const filename = config.get('database:connection:filename');
-        const filenameOrig = `${filename}.${dbHash}-orig`;
+        const filenameOrig = `${filename}-orig`;
 
-        const dbExists = await fs.pathExists(filenameOrig);
-
-        if (dbExists) {
+        if (dbInitialized) {
             await db.knex.destroy();
             await fs.copyFile(filenameOrig, filename);
         } else {
+            await fs.remove(filename);
+            await fs.remove(`${filename}-journal`);
+            await fs.remove(filenameOrig);
+
             // Do a full database reset & initialisation
             await forceReinit();
 
             await fs.copyFile(filename, filenameOrig);
+            dbInitialized = true;
         }
     } else {
         if (truncate) {