Merge branch '337-modulecmd-use-of-wrong-shell-in-sub-cmd-unload' into 'master'

Resolve "modulecmd: use of wrong shell in sub-cmd unload"

Closes #337

See merge request Pmodules/src!316

Pmodules/modulecmd.bash.in

@@ -1011,7 +1011,7 @@ subcommand_unload() {
 		is_modulefile modulecmd "${lmfile}" || die_not_a_modulefile "${arg}"
 
 	        local output=''
-		output=$("${modulecmd}" "${Shell}" 'unload' "${arg}")
+		output=$("${modulecmd}" 'bash' 'unload' "${arg}")
 		if [[ -n "${output}" ]]; then
 			eval "$(echo "${output}"|${sed} -e 's/;unalias [^;]*//g')"
 		fi