kazoo: KZ_URL_MAX_SIZE set to 100

- previous version was too low (50) - reported by Niklas Larsson, GH
  #529
- master and 4.4 has it already increased

(cherry picked from commit b40d2ec)

modules/kazoo/kz_amqp.c

@@ -382,7 +382,7 @@ void kz_amqp_destroy() {
 
 }
 
-#define KZ_URL_MAX_SIZE 50
+#define KZ_URL_MAX_SIZE 100
 static char* KZ_URL_ROOT = "/";
 
 int kz_amqp_add_connection(modparam_t type, void* val)