Only check hostname for mismatch after time since ready has past

Configure hostname checking so it is not checked until a VM has been
ready for greater than one minute. Without this change hostname checking
will often fail because the configured value has not propogated to the
VM on some platforms before this check is run.

spec/unit/pool_manager_spec.rb

@@ -197,7 +197,7 @@ EOT
         redis.hset("vmpooler__vm__#{vm}", 'clone',Time.now.to_s)
         expect(metrics).to receive(:timing).with(/time_to_ready_state\./,/0/)
 
-        subject.move_pending_vm_to_ready(vm, pool, host)
+        subject.move_pending_vm_to_ready(vm, pool)
       end
 
 
@@ -329,13 +329,22 @@ EOT
       end
 
       context 'with hostname mismatch checking enabled' do
-        before(:each) do
-          expect(provider).to receive(:get_vm).with(pool,vm).and_return(host)
+
+        context 'when less than 60 seconds since a VM moved to ready' do
+          before(:each) do
+            redis.hset("vmpooler__vm__#{vm}", 'ready', Time.now)
+          end
+
+          it 'should return nil' do
+            expect(subject._check_ready_vm(vm, poolconfig, ttl, provider)).to be_nil
+          end
         end
 
         context 'with a hostname mismatch' do
+          let(:different_hostname) { 'different_name' }
           before(:each) do
-            host['hostname'] = 'different_name'
+            expect(provider).to receive(:get_vm).with(pool,vm).and_return(host)
+            host['hostname'] = different_hostname
           end
 
           it 'should move the VM to the completed queue' do
@@ -353,7 +362,7 @@ EOT
           end
 
           it 'should log messages about being misnamed' do
-            expect(logger).to receive(:log).with('d', "[!] [#{pool}] '#{vm}' has mismatched hostname, removed from 'ready' queue")
+            expect(logger).to receive(:log).with('d', "[!] [#{pool}] '#{vm}' has mismatched hostname #{different_hostname}, removed from 'ready' queue")
 
             subject._check_ready_vm(vm, poolconfig, ttl, provider)
           end