(MAINT) Rename New Port Config

Rename port to check_pending_port and port_timeout to
check_pending_timeout.

The default settings have also been moved to a location where other
defaults are being set.

vmpooler.yaml.example

@@ -162,11 +162,11 @@
 #   - domain
 #     If set, returns a top-level 'domain' JSON key in POST requests
 #
-#   - port
+#   - check_pending_port
 #     The port number used to verify a host is ready and available.
 #     (optional; default: 22)
 #
-#   - port_timeout
+#   - check_pending_timeout
 #     How long (in seconds) to wait for connection to port before canceling.
 #     This is not used in marking a VM dead or stale.
 #     (optional; default: 5)
@@ -186,8 +186,8 @@
     - 'created_by'
     - 'project'
   domain: 'company.com'
-  port: 22
-  port_timeout: 5
+  check_pending_port: 22
+  check_pending_timeout: 5
 
 # :pools:
 #