rename ktp_integration target so it comply to the name in dbus service file

Summary:
kded was complaining that it could not find some of the modules

```
kded5[7242]: kf5.kded: could not find kded module with id "ktp_integration_module"
```

so let's rename target from ktp_integration to ktp_integration_module so we comply with what configured in service file:
```
[D-BUS Service]
Name=org.freedesktop.Telepathy.Client.KTp.KdedIntegrationModule
Exec=/usr/bin/dbus-send --session --type=method_call --dest=org.kde.kded5 /kded org.kde.kded5.loadModule string:"ktp_integration_module"
```

Reviewers: #kde_telepathy, akulichalexandr, nicolasfella

Reviewed By: #kde_telepathy, akulichalexandr

Subscribers: asturmlechner, rdieter, arojas, #kde_telepathy

Tags: #kde_telepathy

Differential Revision: https://phabricator.kde.org/D28604