LONDON (Reuters) - H2O Asset Management, part of French bank Natixis , plans to start charging clients again to join some of its funds, it said on Friday, after suspending fees in an effort to attract business after an outflow of client cash.The London-based firm was hit hard after ratings agency Morningstar placed one of its funds under review citing questions over liquidity and governance, sending shares in Natixis lower and spurring investors to pull their money.Morningstar had been..