core: Convert FP ports to ints [GH-2173]

CHANGELOG.md

@@ -12,6 +12,7 @@ BUG FIXES:
     to be ready
   - core: `Guest#capability?` now works with strings as well
   - core: Fix NoMethodError in the new `Vagrant.has_plugin?` method [GH-2189]
+  - core: Convert forwarded port parameters to integers. [GH-2173]
   - hosts/arch: NFS exporting works properly, no exceptions. [GH-2161]
   - hosts/bsd: Use only `sudo` for writing NFS exports. This lets NFS
     exports work if you have sudo privs but not `su`. [GH-2191]

plugins/kernel_v2/config/vm.rb

@@ -263,6 +263,14 @@ module VagrantPlugins
         # default VM which just inherits the rest of the configuration.
         define(DEFAULT_VM_NAME) if defined_vm_keys.empty?
 
+        # Clean up some network configurations
+        @__networks.each do |type, opts|
+          if type == :forwarded_port
+            opts[:guest] = opts[:guest].to_i if opts[:guest]
+            opts[:host] = opts[:host].to_i if opts[:host]
+          end
+        end
+
         # Compile all the provider configurations
         @__providers.each do |name, blocks|
           # If we don't have any configuration blocks, then ignore it