fix to redis to pass boolean into assertion

Author: DavertMik

src/Codeception/Module/Redis.php

@@ -323,7 +323,7 @@ public function haveInRedis($type, $key, $value)
      */
     public function dontSeeInRedis($key, $value = null)
     {
-        $this->assertFalse(
+        $this->assertFalse((bool)
             $this->checkKeyExists($key, $value),
             "The key \"$key\" exists" . ($value ? ' and its value matches the one provided' : '')
         );
@@ -360,7 +360,7 @@ public function dontSeeInRedis($key, $value = null)
      */
     public function dontSeeRedisKeyContains($key, $item, $itemValue = null)
     {
-        $this->assertFalse(
+        $this->assertFalse((bool)
             $this->checkKeyContains($key, $item, $itemValue),
             "The key \"$key\" contains " . (
                 is_null($itemValue)
@@ -396,7 +396,7 @@ public function dontSeeRedisKeyContains($key, $item, $itemValue = null)
      */
     public function seeInRedis($key, $value = null)
     {
-        $this->assertTrue(
+        $this->assertTrue((bool)
             $this->checkKeyExists($key, $value),
             "Cannot find key \"$key\"" . ($value ? ' with the provided value' : '')
         );
@@ -460,7 +460,7 @@ public function sendCommandToRedis($command)
      */
     public function seeRedisKeyContains($key, $item, $itemValue = null)
     {
-        $this->assertTrue(
+        $this->assertTrue((bool)
             $this->checkKeyContains($key, $item, $itemValue),
             "The key \"$key\" does not contain " . (
             is_null($itemValue)