Template Errors not being printed bug

[smehta99]

I was having problems with templates not being created. I kept getting this error:

me@machine: ~/repo/pavilion2/examples/tutorials> pav run umt

Error making tests for series 's68'.
  Error creating test 'umt.base' in test set 'cmd_line'
    Error resolving Build template files

After diving into the pavilion code, I learned:

1. That my template file was named incorrectly.
2. One of the variables wasn't set in my test config. Both of these errors would result in that error.

Looking at the create_files.py within the lib/pavilion dir, its supposed to print the error but it doesn't seem like it does.

def resolve_template(pav_cfg: pavilion.config.PavConfig, template: str,
                     var_man: variables.VariableSetManager) -> List[str]:
    """Resolve each of the template files specified in the test config."""

    tmpl_path = pav_cfg.find_file(Path(template), 'test_src')
    if tmpl_path is None:
        raise TestConfigError("Template file '{}' from 'templates' does not exist in "
                              "any 'test_src' dir (Note that it must be in a Pavilion config "
                              "area's test_src directory - NOT the build directory.)"
                              .format(template))

    try:
        with tmpl_path.open() as tmpl_file:
            tmpl_lines = tmpl_file.readlines()
    except OSError as err:
        raise TestConfigError("Error reading template file '{}'".format(tmpl_path), err)

    try:
        return resolve.section_values(tmpl_lines, var_man)
    except TestConfigError as err:
        raise TestConfigError("Error resolving template '{}'"
                              .format(tmpl_path), err)

lib/pavilion/errors.py needs to be updated so the errors can be printed.

[smehta99]

Feel like this could be related to #585