Move instantiation tests into a subtest
Move instantiation tests into a subtest

Quinny/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,stmuk/perl6-examples,stmuk/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,shlomif/perl6-examples,stmuk/perl6-examples,Quinny/perl6-examples,perl6/perl6-examples,Quinny/perl6-examples,shlomif/perl6-examples,Quinny/perl6-examples,shlomif/perl6-examples,perl6/perl6-examples,stmuk/perl6-examples