Improvement: Speeding up slow tests (#707)

* Speeds up tests

* Reduces time.Sleeps, lowers CreateTestBot complexity. Breaks things

* Removal of unecessary config reads. Parallel tests. Lower times

* Speeds up recent trades results

* mini update

* zoooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooom

* Removes the dupes

* Lint

* post cherrypick

* Fix rare kraken data race

* Fixes banking global issues. Fixes postgres trades

* rmline for appveyor test

* Expands timeout in event that channel is closed before send

* Fix data race

* No rows, no bows and definitely no shows

* Removes parallel from createsnapshot tests

* Extends timedmutext test a smidge. Exchange fatality

* Shorter end timeframe and bigger candle

database/drivers/postgres/postgres.go

@@ -11,6 +11,12 @@ import (
 
 // Connect opens a connection to Postgres database and returns a pointer to database.DB
 func Connect(cfg *database.Config) (*database.Instance, error) {
+	if cfg == nil {
+		return nil, database.ErrNilConfig
+	}
+	if !cfg.Enabled {
+		return nil, database.ErrDatabaseSupportDisabled
+	}
 	if cfg.SSLMode == "" {
 		cfg.SSLMode = "disable"
 	}