Results 2 issues of tomaluca95

I'm using CI 3.1.10 and when I run a `get` against a database with the oci8 driver I have to manualy run `->load()` against `OCI-Lob` objects. I think this is...

Feature Request
Enhancement

The function ``` func (ns *MapNamespace) Attribute(n *ua.NodeID, a ua.AttributeID) *ua.DataValue { ``` is missing lock/unlock I get panics due to cuncurrent rw on the Data map