Remove OIDCPSessionContext.cs from project file
Allow tests for German language computers

Some tests depend on English language exceptions. This is partially
fixed to also handle German language exceptions.
Fix empty values or parameter names in OpenIdConnectMessage constructor

The KeyValuePair constructor (which is used to handle post requests)
cannot handle empty names or values correctly (e.g. &xx=xx is ok, &= is
not). IE11 passes those form parameters in case of <input> elements
without name attribute,
Revert "Allow tests for German language computers"

This reverts commit 7d952ef442ac6deb220812cd3ded4ddc32d8e0c9.
Revert "Remove OIDCPSessionContext.cs from project file"

This reverts commit a895f080b99ef872be60f06bf6665cbe1b4eb8c5.
Merge pull request #15 from steven-r/fixNullExceptionOnEmptyName

Fix null exception on empty name