linq

Filtering using name + schema or regex + schema option currently fails with 'name' or 'regex' property required error.

As workaround remove schema filter.

E.g. failing filter:

{
    "schema": {
        "exclude-tables": [
            {
                "regex": "temp_table_.*",
                "schema": "dbo"
            }
        ]
    }
}

Workaround:

`

SessionFactoryImpl.Close currently allows the body of the function to be run multiple times as it does not check if it is closed prior to proceeding. This should be changed so that Close when called from Dispose does nothing when Close has been called by the application.

On a general level I am not an expert in NHibernate or FluentNHibernate. I need your help to collect all the improvements and bugs that have been lost in the past and are relevant, and the following NHibernate improvements.

We can just break down everything in Features, Improvements and Bugs. If a new idea or bug just open a issue, if not leave here the reference to the issue or PR (example: #1