Werk #13670: agent_jenkins: Better error handling

Component	Checks & agents
Title	agent_jenkins: Better error handling
Date	Feb 21, 2022
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk Cloud (CCE), Checkmk MSP (CME) 2.1.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 2.0.0p21 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Connection errors resulted in a traceback. You will now get an error like Could not fetch data from jenkins. Details: <Response [401]>.

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