Phonebook sample won't load on modern IPM

https://github.com/intersystems/ipm/blob/v0.7.x/src/%25ZPM/AbstractInstaller.cls was removed in IPM 0.9.x; need to update the installer for the phonebook sample with at least:

```
ClassMethod OnInstallComponent(pDatabase As %String, pVerbose As %Boolean = 0, pDevMode As %Boolean = 0, pIsUpgrade As %Boolean = 0) As %Status
{
Quit $$$OK
}
```

And remove the superclass. Should also review uninstall behavior and make sure it's OK too.