Improve message when user specify wrong cluster and client obtain unspecified API output

[exalate-issue-sync]

Following code gives attribute error instead of bad connection.

{noformat}connect_params = {'https': False,
'verify_ssl_certificates': False,
'context_path': "projects/p1/h2oEngines/e2",
'ip': "http://cloud-dev.h2o.ai",
'port': 80}

h2o.connect(
config=connect_params
){noformat}

Problem is that response is with code 200 but we didn’t check the response before we access it. We could check it before and give better message to user than pythons missing attribute error.

[h2o-ops]

JIRA Issue Details

Jira Issue: PUBDEV-8918
Assignee: Adam Valenta
Reporter: Adam Valenta
State: Resolved
Fix Version: 3.40.0.1
Attachments: N/A
Development PRs: Available

[h2o-ops]

Linked PRs from JIRA

#6431