Create preliminary documentation for ONAP DMI-Plugin

Modify requirements doc file based on this commit to fix Sphinx config
https://gerrit.onap.org/r/c/doc/+/124461

Issue-ID: CPS-625
Change-Id: I689f1cc48fd3f02ecb22fdcace6b42e1400d179c
Signed-off-by: DylanB95EST <dylan.byrne@est.tech>
1 file changed