Fixed findings

List of Findings

Error: SHELLCHECK_WARNING (CWE-457): [#def1]
/usr/bin/ima-setup:36:10: warning[SC2154]: policy_file is referenced but not assigned.
#   34|   		ima_policy_path=${_opt#*=}
#   35|   		if [[ ! -e $ima_policy_path ]]; then
#   36|-> 			echo "$policy_file doesn't exist"
#   37|   			exit 1
#   38|   		fi

Error: SHELLCHECK_WARNING (CWE-563): [#def2]
/usr/bin/ima-setup:41:3: warning[SC2034]: reinstall_threshold appears unused. Verify use (or export if used externally).
#   39|   		;;
#   40|   	--reinstall_threshold=*)
#   41|-> 		reinstall_threshold=${_opt#*=}
#   42|   		;;
#   43|   	*)

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