Removes wpa_supplicant.conf on failed start so the user has a chance to correct it (#386)
Removes wpa_supplicant.conf on failed start so the user has a chance to correct it (#386)

Also-by: 96a06bea4f9e6b852d7e3e03004fe8a0086a6b32@tu-ilmenau.de (github: ThomDietrich)
Signed-off-by: bba729dd2598f464095e4aece531d4fed4a11220@gmail.com (github: jscottnz)
openhab/openhabian,ThomDietrich/openhabian,openhab/openhabian,openhab/openhabian