[webservice] Add proposal state check

Description

This PR addresses https://git.xfel.eu/calibration/planning/-/issues/109 where it's described that we want to run closed proposals on the regular partitions, rather than blocking ongoing proposals.

How Has This Been Tested?

Unit test + test on max-exfl017:

proposal on test_metadata	action	expected partition	proposal status	passed	log
p900113	correct	exfel	FR	✓	2022-02-21 16:50:09,987 - root - DEBUG - [webservice.py:663] Using exfel for 900113 because FR
p900113	dark	exfel	FR	✓	2022-02-21 16:50:59,235 - root - DEBUG - [webservice.py:663] Using exfel for 900113 because FR
p900214	correct	upex-middle	A	✓	2022-02-21 16:52:13,047 - root - DEBUG - [webservice.py:663] Using exfel for 900214 because A
p900214	dark	upex-high	A	✓	2022-02-21 16:50:47,630 - root - DEBUG - [webservice.py:663] Using exfel for 900214 because A

Relevant Documents (optional)

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I added tests where appropriate.

Reviewers

@calibration

tests/test_webservice.py

@@ -13,6 +13,7 @@ from webservice.webservice import (  # noqa: import not at top of file
     parse_config,
     run_action,
     wait_on_transfer,
+    get_slurm_partition,
 )
 
 
@@ -151,3 +152,28 @@ async def test_run_action(mode, cmd, retcode, expected):
     webservice.webservice.run_proc_async = mock_run_proc_async
     ret = await run_action(job_db, cmd, mode, 1, 1, 1)
     assert ret.lower().startswith(expected)
+
+@pytest.mark.asyncio
+@pytest.mark.parametrize(
+    'proposal_number, action, mock_proposal_status, expected_result',
+    [
+        (42, 'correct', 'A', 'upex-middle'),  # active
+        ('42', 'dark', 'A', 'upex-high'),  # active
+        (404, 'correct', 'FR', 'exfel'),  # finished and reviewed
+        (404, 'dark', 'CLO', 'exfel'),  # closed
+    ],
+)
+async def test_get_slurm_partition(proposal_number,
+                                   action,
+                                   mock_proposal_status,
+                                   expected_result):
+
+    response = mock.Mock()
+    response.status_code = 200
+    response.json = mock.Mock(return_value={'flg_beamtime_status': mock_proposal_status})
+    client = mock.Mock()
+    client.get_proposal_by_number_api = mock.Mock(
+        return_value=response)
+
+    ret = await get_slurm_partition(client, action, proposal_number)
+    assert ret == expected_result