redis: Fix List call to strip table prefix from result

The plugin stores the keys prefixed with the "Table" name in Redis. We
should remove that prefix from the keys returned by "List()".

Partial-Fix: micro#57

v4/store/redis/redis.go

@@ -4,6 +4,7 @@ package redis
 import (
 	"context"
 	"fmt"
+	"strings"
 	"time"
 
 	"github.com/go-redis/redis/v8"
@@ -175,6 +176,10 @@ func (r *rkv) List(opts ...store.ListOption) ([]string, error) {
 			return nil, err
 		}
 
+		for i, key := range keys {
+			keys[i] = strings.TrimPrefix(key, options.Table)
+		}
+
 		allKeys = append(allKeys, keys...)
 
 		if cursor == 0 {