software/kvm: use a different storage-path for password

This will force a password reset

software/kvm/buildout.hash.cfg

@@ -19,7 +19,7 @@ md5sum = f2b0f1ed27148504f220e06eaceff935
 
 [template-kvm]
 filename = instance-kvm.cfg.jinja2
-md5sum = 826c4d56f5d1b66fd35abf183dbf28b4
+md5sum = 7429b71e6834ba8e016b1d8249aea8e8
 
 [template-kvm-cluster]
 filename = instance-kvm-cluster.cfg.jinja2.in

software/kvm/instance-kvm.cfg.jinja2

@@ -84,7 +84,8 @@ storage-path = ${directory:srv}/tap_mac
 
 [gen-passwd]
 recipe = slapos.cookbook:generate.password
-storage-path = ${directory:srv}/passwd
+storage-path = ${directory:srv}/.passwd
+# VNC protocol supports passwords of 8 characters max
 bytes = 8
 
 {% if boot_image_url_select_enabled %}