Fix UPS and USPS time parsing

[aldin-alagic]

Bug fixes:

• Fix the UPS tracker incorrectly parsing the 12-hour time component due to missing 'a' token
• Fix the USPS tracker not parsing time correctly due to extra spaces in the middle of the time string

[dav72]

I have tried to implement this thing on my usps tracking site at Usps tracking , but almost all of trackers not working except usps , Canada post. Ups partially work. India post, fedex kind of not working.