.travis.yml: unix minimal: Exclude more __slots__ tests.
.travis.yml: unix minimal: Exclude more __slots__ tests.

Change-Id: Ieb85d916d560f019b7d07fbdb5c4312891454e8c
Signed-off-by: Paul Sokolovsky <9dc5061f178bb11813e14f1ed02ba27eaf21fa5d@users.sourceforge.net>

pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython,pfalcon/micropython