Werk #10105: oracle_rman: don't crash on intermittent connection loss

Component	Checks & agents
Title	oracle_rman: don't crash on intermittent connection loss
Date	Sep 11, 2019
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.5.0p23 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

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