Active key is not required when owner key present

- when updating account there is no need to sign with the active key if
 the owner has signed.
 - when updating an account the active key is enough to update the
 active key.

libraries/chain/include/graphene/chain/protocol/account.hpp

@@ -104,7 +104,10 @@ namespace graphene { namespace chain {
       share_type calculate_fee( const fee_parameters_type& k )const;
 
       void get_required_owner_authorities( flat_set<account_id_type>& a )const
-      { if( owner || active ) a.insert( account ); }
+      { if( owner ) a.insert( account ); }
+
+      void get_required_active_authorities( flat_set<account_id_type>& a )const
+      { if( !owner ) a.insert( account ); }
 
       void       get_impacted_accounts( flat_set<account_id_type>& i )const
       { 

tests/tests/operation_tests.cpp

@@ -1217,15 +1217,6 @@ BOOST_AUTO_TEST_CASE( witness_pay_test )
 
 } FC_LOG_AND_RETHROW() }
 
-/**
- *  Asset Burn Test should make sure that all assets except bitassets
- *  can be burned and all supplies add up.
- */
-BOOST_AUTO_TEST_CASE_EXPECTED_FAILURES( unimp_burn_asset_test, 1 )
-BOOST_AUTO_TEST_CASE( unimp_burn_asset_test )
-{
-   BOOST_FAIL( "not implemented" );
-}
 
 /**
  * This test demonstrates how using the call_order_update_operation to

tests/tests/uia_tests.cpp

@@ -296,13 +296,5 @@ BOOST_AUTO_TEST_CASE( unimp_halt_transfers_flag_test )
    BOOST_FAIL( "not implemented" );
 }
 
-/**
- * verify that issuers can retract funds
- */
-BOOST_AUTO_TEST_CASE_EXPECTED_FAILURES( unimp_fund_retraction_test, 1 )
-BOOST_AUTO_TEST_CASE( unimp_fund_retraction_test )
-{
-   BOOST_FAIL( "not implemented" );
-}
 
 BOOST_AUTO_TEST_SUITE_END()