Fix decryption test suite on Windows

Change-Id: Ib8207d56a7e064855ce1444c927913c9c9258788
Reviewed-on: https://code.wireshark.org/review/8766
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>

test/config/ssl_keys.tmpl

@@ -1 +1,2 @@
 "127.0.0.1","443","http","TEST_KEYS_DIRrsasnakeoil2.key",""
+"127.0.0.1","9131","http","TEST_KEYS_DIRkey.p12","WebAS"

test/suite-decryption.sh

@@ -122,7 +122,6 @@ decryption_step_ssl() {
 # SSL, using the server's private key with password
 decryption_step_ssl_with_password() {
 	$TESTS_DIR/run_and_catch_crashes env $TS_DC_ENV $TSHARK $TS_DC_ARGS -Tfields -e http.request.uri \
-		-o "ssl.keys_list: 127.0.0.1,9131,http,$TEST_KEYS_DIR/key.p12,WebAS" \
 		-r "$CAPTURE_DIR/dmgr.pcapng" -Y http \
 		| grep unsecureLogon.jsp > /dev/null 2>&1
 	RETURNVALUE=$?