TestCommon: Update historical module description
TestCommon: Update historical module description

Signed-off-by: Niklas Hambuechen <98215d3a72cb13cc9c9956528e50119ca7d1fb8b@google.com>
Signed-off-by: Petr Pudlak <9d19625f8ee825a2c398462ed335cbcf98f79c32@google.com>
Reviewed-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>

grnet/snf-ganeti,ganeti/ganeti,grnet/snf-ganeti,andir/ganeti,leshchevds/ganeti,yiannist/ganeti,mbakke/ganeti,bitemyapp/ganeti,dimara/ganeti,leshchevds/ganeti,apyrgio/ganeti,ganeti/ganeti,bitemyapp/ganeti,onponomarev/ganeti,mbakke/ganeti,onponomarev/ganeti,leshchevds/ganeti,andir/ganeti,yiannist/ganeti,ganeti/ganeti,dimara/ganeti,yiannist/ganeti,ganeti-github-testing/ganeti-test-1,andir/ganeti,mbakke/ganeti,ganeti-github-testing/ganeti-test-1,apyrgio/ganeti