Changing SQL Server DB Schema at runtime (#802)

[denisekart]

Adds the ability to change the EF database context schema at runtime.

This can be achieved when configuring entity framework at startup

This is an example of how to configure separate schemas for both core and identity database context

options.UseEF<SQLServerDb>(db => db
    .UseSqlServer(connectionString)
    .UseCustomDatabaseSchema("not_dbo"));
options.UseIdentityWithSeed<IdentitySQLServerDb>(db => db
    .UseSqlServer(connectionString)
    .UseCustomDatabaseSchema("id"));

This feature works with any database provider that supports schemas.

This is not a complete solution since the design time schema changes were still not addressed (See discussion on piranha.core/issues/802).

[dnfadmin]

All CLA requirements met.

[tidyui]

Just to clarify. These changes allow for Piranha to run against another schema, but it does not allow it to create the database in a different schema?