Fix 2008 Maryland general election validation
Fix 2008 Maryland general election validation

It reflected the wrong election ID due to the datasource not handling
the 2008 special election.

Addresses https://github.com/openelections/core/issues/36,
https://github.com/openelections/core/issues/107

openelections/openelections-core,cathydeng/openelections-core,openelections/openelections-core,datamade/openelections-core,datamade/openelections-core,cathydeng/openelections-core