Description of problem:
Teiid does not process header *OData-Isolation: snapshot* defined in request correctly.
* if service (Teiid) does not support this option it must return error 412
* if Teiid does supports this option then it is not processed correctly, because modifications made during request are visbile

See http://docs.oasis-open.org/odata/odata/v4.0/errata02/os/complete/part1-protocol/odata-v4.0-errata02-os-part1-protocol-complete.html#_Toc406398231


Steps to Reproduce:
1. Request [1]
2. Request [2]
3. Data modification via JDBC
4. Request [2]

Data returned from steps 2. and 4. are different.

[1]
Jsoup.connect("http://localhost:8080/odata4/Redshift/Source/SmallA/?$select=IntKey")
                .header("Authorization", "Basic "+ Base64.encodeBytes(("user:user").getBytes()))
                .header("OData-MaxVersion", "4.0")
                .header("Accept", "application/xml")
                .header("OData-Isolation", "snapshot")
                .header("Prefer", "odata.maxpagesize=10")

[2]
Jsoup.connect("http://localhost:8080/odata4/Redshift/Source/SmallA/?$select=IntKey&$skiptoken=+koj1e+zqsMU--10")
                .header("Authorization", "Basic "+ Base64.encodeBytes(("user:user").getBytes()))
                .header("OData-MaxVersion", "4.0")
                .header("Accept", "application/xml")
                .header("Prefer", "odata.maxpagesize=10")