[BUG] Add a check to add endpoints to SMD correctly

[davidallendj]

Describe the bug
Magellan is not able to add endpoints to SMD correctly if first trying to run with bad user+password. The issue is very likely due to Magellan not a check in place to make sure valid redfish information is being returned with fetching data with collect.

To Reproduce
Steps to reproduce the behavior:

1. Run magellan with a bad user+password combination (will still create endpoints)
2. Try and run again with correct user+password combination
3. Errors out (?) and does not add to SMD

Expected behavior
Add redfish endpoints to SMD.