Investigate possibility to manage non case sensitive entity names

[vbauzys]

Reference https://github.com/terraform-providers/terraform-provider-vcd/issues/120

One of noticed things that VCD UI don't allow to create Organization which different cases and same name, for e.g. "chair" and "Chair". Though current implementation of govcd requires case sensitive organization name.

Needs to investigate possibility to accept non sensitive case names. This includes not only searching for organization, but other services and queries. Also what about other entities - networks, edges gtw, pools, etc. What code changes are needed for that?