CLOUDP-60875: List host databases, OM

[gssbzn]

Proposed changes

Jira ticket: CLOUDP-60875

Checklist

• I have added tests that prove my fix is effective or that my feature works
• I have added any necessary documentation (if appropriate)
• I have run make fmt and formatted my code

Further comments

mongocli om measurements databases ls d66d290e6c9a2eae6f26907a1b605500 -P om
{
	"links": [
		{
			"rel": "self",
			"href": "http://mms:8080/api/public/v1.0/groups/5e98249d937cfc52efdc2a9f/hosts/d66d290e6c9a2eae6f26907a1b605500/databases?pageNum=1\u0026itemsPerPage=100"
		}
	],
	"results": [
		{
			"links": [
				{
					"rel": "self",
					"href": "http://mms:8080/api/public/v1.0/groups/5e98249d937cfc52efdc2a9f/hosts/d66d290e6c9a2eae6f26907a1b605500/databases/adsds"
				}
			],
			"databaseName": "adsds"
		},
		{
			"links": [
				{
					"rel": "self",
					"href": "http://mms:8080/api/public/v1.0/groups/5e98249d937cfc52efdc2a9f/hosts/d66d290e6c9a2eae6f26907a1b605500/databases/config"
				}
			],
			"databaseName": "config"
		},
		{
			"links": [
				{
					"rel": "self",
					"href": "http://mms:8080/api/public/v1.0/groups/5e98249d937cfc52efdc2a9f/hosts/d66d290e6c9a2eae6f26907a1b605500/databases/local"
				}
			],
			"databaseName": "local"
		}
	],
	"totalCount": 3
}

[andreaangiolillo]

LGTM