Fixing #15 by removing existing Tentacle.config file

Author: robdmoore

AzureWebFarm.OctopusDeploy.Tests/Infrastructure/OctopusDeployTests.WhenUninstallingTentacle_ThenTheCorrectCommandsShouldBeSentToTentacleExe.approved.txt

@@ -1,3 +1,4 @@
 c:\Install\Tentacle\Tentacle.exe service --instance "Tentacle" --stop --uninstall --console
 c:\Install\Tentacle\Tentacle.exe delete-instance --instance "Tentacle" --console
 msiexec /uninstall "c:\InstallOctopus.Tentacle.msi" /quiet
+cmd.exe /c del "c:\InstallTentacle.config"

AzureWebFarm.OctopusDeploy/Infrastructure/OctopusDeploy.cs

@@ -110,6 +110,7 @@ public void UninstallTentacle()
             _processRunner.Run(_tentaclePath, string.Format("delete-instance {0} --console", InstanceArg));
             _processRunner.Run("msiexec", string.Format("/uninstall \"{0}{1}\" /quiet", _tentacleInstallPath, "Octopus.Tentacle.msi"));
             _registryEditor.DeleteLocalMachineTree("Software", "Octopus");
+            _processRunner.Run("cmd.exe", string.Format("/c del \"{0}{1}\"", _tentacleInstallPath, "Tentacle.config"));
         }
     }
 }