esx: Add VNC support

* src/conf/domain_conf.c: add defaults for the video device
* src/esx/esx_vmx.[ch]: add VNC support to the VMX handling
* tests/vmx2xmltest.c, tests/xml2vmxtest.c: add tests for the VNC support

tests/xml2vmxdata/xml2vmx-graphics-vnc.vmx

@@ -0,0 +1,11 @@
+config.version = "8"
+virtualHW.version = "4"
+guestOS = "other"
+uuid.bios = "56 4d 9b ef ac d9 b4 e0-c8 f0 ae a8 b9 10 35 15"
+displayName = "minimal"
+memsize = "4"
+numvcpus = "1"
+RemoteDisplay.vnc.enabled = "true"
+RemoteDisplay.vnc.port = "5903"
+RemoteDisplay.vnc.keymap = "de"
+RemoteDisplay.vnc.password = "password"

tests/xml2vmxdata/xml2vmx-graphics-vnc.xml

@@ -0,0 +1,11 @@
+<domain type='vmware'>
+  <name>minimal</name>
+  <uuid>564d9bef-acd9-b4e0-c8f0-aea8b9103515</uuid>
+  <memory>4096</memory>
+  <os>
+    <type>hvm</type>
+  </os>
+  <devices>
+    <graphics type='vnc' port='5903' autoport='no' keymap='de' passwd='password'/>
+  </devices>
+</domain>