changed dnx version to beta 7
changed dnx version to beta 7

mscoe/fabrikam-vnext,mscoe/fabrikam-vnext,yuva2achieve/fabrikam-vnext,yuva2achieve/fabrikam-vnext,VIGUCOOL/fabrikam-vnext,mscoe/fabrikam-vnext,VIGUCOOL/fabrikam-vnext,yuva2achieve/fabrikam-vnext,VIGUCOOL/fabrikam-vnext,yuva2achieve/fabrikam-vnext,yuva2achieve/fabrikam-vnext,yuva2achieve/fabrikam-vnext,yuva2achieve/fabrikam-vnext