fixed conj wish-dmnorm test by providing Omega initial value
fixed conj wish-dmnorm test by providing Omega initial value

nxdao2000/nimble,nimble-dev/nimble,nxdao2000/nimble,nimble-dev/nimble,NLMichaud/nimble,nimble-dev/nimble,NLMichaud/nimble,NLMichaud/nimble,nimble-dev/nimble,nxdao2000/nimble,nxdao2000/nimble,nimble-dev/nimble,NLMichaud/nimble