all: cleanup sqlite.connect statements (do not leave strange test.db or vweb.sql artefacts around, after running common tests)

cmd/tools/vcreate.v

@@ -304,7 +304,7 @@ fn (mut c Create) set_web_project_files() {
 import db.sqlite // can change to 'db.mysql', 'db.pg'
 
 pub fn create_db_connection() !sqlite.DB {
-	mut db := sqlite.connect('vweb.sql')!
+	mut db := sqlite.connect('app.db')!
 	return db
 }
 "
@@ -500,7 +500,7 @@ fn (mut app App) service_auth(username string, password string) !string {
 	}
 
 	defer {
-		db.close() or { panic('fail to close database') }
+		db.close() or { panic(err) }
 	}
 
 	user := sql db {

examples/vweb_fullstack/src/auth_services.v

@@ -31,7 +31,7 @@ fn (mut app App) service_auth(username string, password string) !string {
 	}
 
 	defer {
-		db.close() or { panic('fail to close database') }
+		db.close() or { panic(err) }
 	}
 
 	user := sql db {

examples/vweb_fullstack/src/databases/config_databases_sqlite.v

@@ -3,6 +3,6 @@ module databases
 import db.sqlite // can change to 'db.mysql', 'db.pg'
 
 pub fn create_db_connection() !sqlite.DB {
-	mut db := sqlite.connect('vweb.sql')!
+	mut db := sqlite.connect('app.db')!
 	return db
 }

vlib/v/tests/orm_stmt_wrong_return_checking_test.v

@@ -7,7 +7,7 @@ pub mut:
 }
 
 fn add_target(repo Target) !int {
-	mut dbs := sqlite.connect('test.db')!
+	mut dbs := sqlite.connect(':memory:')!
 	defer {
 		dbs.close() or { panic(err) }
 	}