rasql.py truncates error messages with single quote in them

[Dimitar Misev]

The following testcases should be fixed and removed from rasdapy3/known_fails:

#error message is returned in a wrong format
select_pos_independent_wrong_name.rasql
sort_dim_out_of_spatial_domain.rasql
flip_axis_name_wrong.rasql
flip_dim_out_of_spatial_domain.rasql

E.g. expected output for the first one is

rasdaman error 347: Execution error 347 in line 1, column 15, 
near token test_grey: Name of the axis doesn't correspond with 
any defined axis name of the type.

but rasql.py returns

t correspond with any defined axis name of the type.

[Dimitar Misev]

Also floating-point values can be printed same as standard rasql with

# float value
"{:.7g}".format(value)

# double value
"{:.16g}".format(value)