Improve utility functions
Improve utility functions

move make_simple_boundary to be a function instead of a testcase method.

Have make_instance take a name parameter.

RickMohr/otm-core,recklessromeo/otm-core,clever-crow-consulting/otm-core,recklessromeo/otm-core,maurizi/otm-core,RickMohr/otm-core,clever-crow-consulting/otm-core,recklessromeo/otm-core,clever-crow-consulting/otm-core,maurizi/otm-core,RickMohr/otm-core,clever-crow-consulting/otm-core,maurizi/otm-core,maurizi/otm-core,recklessromeo/otm-core,RickMohr/otm-core