Werk #6109: temperature.include, etherbox.temp: fix unicode error

Component	Checks & agents
Title	temperature.include, etherbox.temp: fix unicode error
Date	May 17, 2018
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	1.6.0b1 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.5.0b5 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME) 1.4.0p34 Checkmk Raw (CRE), Checkmk Enterprise (CEE), Checkmk MSP (CME)

Use unicode strings for the units in temperature.include and remove UTF-8 decoding in etherbox.temp. Adapt ra32e_sensors tests to work correctly.

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