REGTESTS: disable temporarly mworker test on OSX

-Ws on VTest is not working correctly for an unknown reason, the polling
of the NOTIFY_SOCKET seems to timeout, and VTest never receives the
READY message.

This patch disables the reg-tests using -Ws on OS X.

reg-tests/connection/http_reuse_always.vtc

@@ -1,3 +1,4 @@
+#EXCLUDE_TARGETS=osx
 varnishtest "Test the http-reuse always mode"
 
 feature ignore_unknown_macro

reg-tests/http-rules/acl_cli_spaces.vtc

@@ -1,3 +1,4 @@
+#EXCLUDE_TARGETS=osx
 varnishtest "haproxy ACL, CLI and mCLI spaces"
 feature ignore_unknown_macro
 

reg-tests/mcli/mcli_debug_dev.vtc

@@ -1,3 +1,4 @@
+#EXCLUDE_TARGETS=osx
 varnishtest "Test master CLI multiple commands with export-mode"
 
 # This test only checks if the master CLI parsing with pipelined commands is working:

reg-tests/mcli/mcli_show_info.vtc

@@ -1,3 +1,4 @@
+#EXCLUDE_TARGETS=osx
 varnishtest "Show info of process 1"
 
 feature ignore_unknown_macro

reg-tests/mcli/mcli_start_progs.vtc

@@ -1,3 +1,4 @@
+#EXCLUDE_TARGETS=osx
 varnishtest "Try to start a master CLI with 2 programs"
 #REGTEST_TYPE=bug
 feature cmd "command -v sleep"