Manage --disable-ofi-inject changes in the transport layer

[wrrobin]

Current changes for the flag are done in the best effort manner. Need them to be organized in transport_ofi.

[markbrown314]

@wrrobin this ticket is not very clear. Could you provide details of the changes that are needed here?

[wrrobin]

The thought was that since this is a OFI specific flag, the use of it should be restricted to the OFI transport layer. Current changes are done above that. This was also specific to a particular provider. So, better restructuring of the code could have been done.