Update iOS TestApp to use 4.0 API

[velicuvlad]

https://jira.issues.couchbase.com/browse/CBL-7447

• Updated to use the default collection where inly database was specified.
• Updated to use LogSinks API instead of the old log API.
• Converted value between maxRotateCount and maxKeptFiles (maxRotateCount = maxKeptFiles - 1).
• Updated to use default collection with CollectionConfiguration when creating ReplicatorConfiguration with database.
• Changed ReplicatorConfiguration setters handlers to ask and return CollectionConfiguration where the specific settings have now moved under CollectionConfiguration: conflictResolver, push/pull filter, channels, documentIDs

[velicuvlad]

https://mobile.jenkins.couchbase.com/job/couchbase-lite-ios-testapp/2590/

[velicuvlad]

Tests will need to be changed slightly for calls such as replicatorConfiguration_set... because now it expects and returns a CollectionConfiguration, instead of ReplicatorConfiguration.

I think it would be more readable if that change happens in tests rather than trying to figure out what to return from an entire ReplicatorConfiguration as it can have multiple, different CollectionConfig inside. I've given a thought on this and, without having the same set of collections with the same config for all or a singular collection, for every test, I don't know what would have to be returned from those calls.

[pasin]

This will not work as the returned value is ReplicatorConfiguration.

[pasin]

There is no way around this as the collections need to be configured upfront.

@sanjivanipatrax @barkha06 how may tests that use these two apis?

replicatorConfiguration_setChannels
replicatorConfiguration_setDocumentIDs

It needs to change to use replicatorConfiguration_configureCollection with the default collection.

[pasin]

CC: @Aniket392

[barkha06]

@pasin None of the tests use those APIs

[pasin]

Any python tests that use this need to be changed to use replicatorConfiguration_configureCollection

@sanjivanipatrax @barkha06

[barkha06]

This API is also not used @pasin

[pasin]

Same as above comment that this will not work as the returned type is ReplicatorConfiguration.

[pasin]

We can remove it then.