AUI-1193 When it is not given, aui-timepicker uses the current minutes instead of zero

Hi @eduardolundgren,

Attached is an update for https://issues.liferay.com/browse/AUI-1193

I added a for loop in the parse function to skip parsing the next part when the separator is not given in the time string. So for string "2 pm", it will parse 2 as hour, skip the minute part since colon is not present, then parse the remaining part for ampm. 

Please let me know if there are any issues. Thanks!