[fix] config.yaml parsing error

Author: Giuseppe Morelli

config/config.yaml.sample

@@ -21,7 +21,7 @@ gmdotnet:
         ram: 1024
         cpu: 1
         extra_hard_disk:
-            create: yes
+            create: no
             filepath: .vagrant/extradisk.vdi
             size: 30 # size in GB
         # PROVISION
@@ -66,7 +66,7 @@ gmdotnet:
 #                    - "-v"
 #                    - "-z"
 #                    - "--delete"
-#               exclude:
+#                exclude:
 #                   - ""
 #            - folder:
 #                host_folder: /mnt/extra/rsync2