fix failing tests in testnet

[oxarbitrage]

This fix the testnet testcases pointed by @jmjatlanta at #1574

The market_tests were easy as we have constants.

The bitasset_tests/hf_935_test is a tough one for me, had problems before so some help will be appreciated to look for an alternative, the buch of blocks generated in this fix is ugly.

Thanks.

[abitmore]

The database_fixture change works, although is a bit ugly, it's better than generating a lot of blocks. IMHO we can merge after wrapped the long line.

Stale

[oxarbitrage]

The database_fixture change works, although is a bit ugly, it's better than generating a lot of blocks.

I agree. There are other similars(

bitshares-core/tests/common/database_fixture.cpp

Line 137 in 7d51919

if( !options.count("track-account") && current_test_name == "track_account2") {

) in the database fixture that are also ugly. This issues can be grouped, they should be initialized for each case by a constructor or something. Of course, for a new issue, not here.