Export the set of pending owners
Export the set of pending owners

...as the question of who has pending requests is an import
part of the data structure.

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

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