Parameterizes ownership of repo config in LWRPs

[cattywampus]

In the install_feature and download_feature resources, the step setup the repository.propertie file was hard coding the owner and group, whereas other config files used the node[:wlp][:user] and node[:wlp][:group] attributes. This causes a problem if a wrapping cookbook tries to change the user or group names, because they will still have to have the hard coded values as a user or group on their system, even if they don't want it. This just keeps everything consistent.