set a default csm-api-host

[jacobsalmela]

Summary and Scope

Fixes a bug where the host was empty and CANI could not initialize a session.

Always sets a host when uses simulation mode. Adjusts tests accordingly

Previous behavior:

% go run main.go alpha session init csm   
1:37PM INF Session is already ACTIVE.
File /Users/jsalmela/.cani/canidb.json already exists. Keep session active but overwrite the datastore: y
2023/09/07 13:37:18 [DEBUG] GET https:///apis/smd/hsm/v2/service/values
2023/09/07 13:37:18 [ERR] GET https:///apis/smd/hsm/v2/service/values request failed: Get "https:///apis/smd/hsm/v2/service/values": http: no Host in request URL
2023/09/07 13:37:18 [DEBUG] GET https:///apis/smd/hsm/v2/service/values: retrying in 1s (4 left)
2023/09/07 13:37:19 [ERR] GET https:///apis/smd/hsm/v2/service/values request failed: Get "https:///apis/smd/hsm/v2/service/values": http: no Host in request URL
2023/09/07 13:37:19 [DEBUG] GET https:///apis/smd/hsm/v2/service/values: retrying in 2s (3 left)

New behavior:

% go run main.go alpha session init csm                                                        
1:38PM INF Session is already ACTIVE.
File /Users/jsalmela/.cani/canidb.json already exists. Keep session active but overwrite the datastore: y
2023/09/07 13:38:21 [DEBUG] GET https://api-gw-service-nmn.local/apis/smd/hsm/v2/service/values

I think there are actually some additional toggles we can enable in terms of flags required/required together

Risks and Mitigations

Low