Add clear method to clear tenant in tenant Manager

Author: miracuthbert

src/Manager.php

@@ -33,6 +33,16 @@ public function setTenant(Tenant $tenant)
         $this->tenant = $tenant;
     }
 
+    /**
+     * Clear tenant.
+     *
+     * @return void
+     */
+    public function clearTenant()
+    {
+        $this->tenant = null;
+    }
+
     /**
      * Check if tenant exists in request.
      *