simplify the convention for importing a test case from Test

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
add a simple script to convert Test/* to Units/*

TODO: Some of tests under Test cannot be converted well.
      e.g. line_directives.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
show the summary of Units

Signed-off-by: Masatake YAMATO <yamato@redhat.com>
add converted test cases to Units

These are just converted.
The correctness of expected.tags are not checked.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>