Update OtherOrganisations.scala

Added Entries for the following organisations:

"GB-7"                         // DEFRA Department for Environment Food & Rural Affairs 
"GB-9"                         // DWP Department for Work and Pensions
"GB-10"                       // DH Department of Health
"GB-COH-RC000346"    // MRC Medical Research Council
"XM-DAC-12-22"          // Welsh Government