Increase MaxConcurrentReconciles number

[hbinkim]

Just so we don't forget about it.

// SetupWithManager creates a new CephCluster Controller and adds it to the Manager
func (r *CephClusterReconciler) SetupWithManager(mgr ctrl.Manager) error {
	return ctrl.NewControllerManagedBy(mgr).
		For(&hypersdsv1alpha1.CephCluster{}).
		Watches(&source.Kind{Type: &v1.RoleBinding{}},
			&handler.EnqueueRequestForOwner{IsController: true, OwnerType: &hypersdsv1alpha1.CephCluster{}}).
		WithOptions(controller.Options{MaxConcurrentReconciles: 10}).
		Complete(r)
}

Looking at operator-framework/operator-sdk#1938 seems like we can come up with an appropriate number and see how it goes.