Fix logging command in Linux/Cache multiwait
Fix logging command in Linux/Cache multiwait

The logging command that tracks the options being sent to the multiwait is
incorrect in the Linux/Cache class.  All others cast the options list to a
string before writing to log.  Fix the Linux/Cache one so that the casting
is done.

OSEHRA-Id: http://issues.osehra.org/browse/OAT-111
Change-Id: I0061790a6b61cb5b2db71f5c9cbb8fdf6881a40f

josephsnyder/VistA,timmvt/VistA_tt,timmvt/VistA_tt,josephsnyder/VistA,OSEHRA-Sandbox/VistA,josephsnyder/VistA,OSEHRA/VistA,mdgeek/VistA-FHIR-CWF,OSEHRA-Sandbox/VistA,shabiel/VistA,OSEHRA/VistA,shabiel/VistA,mdgeek/VistA-FHIR-CWF,mdgeek/VistA-FHIR-CWF,shabiel/VistA,apexdatasolutions/VistA,OSEHRA-Sandbox/VistA,josephsnyder/VistA,OSEHRA/VistA,apexdatasolutions/VistA,mdgeek/VistA-FHIR-CWF,shabiel/VistA,OSEHRA-Sandbox/VistA,shabiel/VistA,shabiel/VistA,apexdatasolutions/VistA,OSEHRA/VistA,timmvt/VistA_tt,josephsnyder/VistA,timmvt/VistA_tt,OSEHRA/VistA,mdgeek/VistA-FHIR-CWF,josephsnyder/VistA,OSEHRA/VistA,mdgeek/VistA-FHIR-CWF,OSEHRA-Sandbox/VistA,apexdatasolutions/VistA,timmvt/VistA_tt,OSEHRA-Sandbox/VistA,apexdatasolutions/VistA