`tns run ios` start iOS Simulator even if physical iOS device is attached

**Description:**
`tns run ios` start iOS Simulator even if physical iOS device is attached

**Steps to reproduce:**
```
Attach physical iOS device and trust it
tns create TestApp
tns run ios TestApp
```

**Environment:**
Xcode 8.2.1
CLI 3.0.0-2017.4.3.1
Node v6.10.0
