Werk #10477: agent_azure: recover from missing metrics

Component	Checks & agents
Title	agent_azure: recover from missing metrics
Date	Nov 25, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.0.0i1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.6.0p9 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Previously the special agent did not return any metric if one or more of the required metrics were not present. It now recovers from those errors and return as many metrics as we can get.

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