test-parse-date: defines explicit start/end dates for DST
Prior to this patch, DST times where tested by specifying a custom TZ
environment variable that didn't defined DST transition times.
Due to a bug in glibc, the test fail on 32bits platforms that use timezone
files generated by zic from tzcode >= 2014c (glibc >= 2.20).
See https://sourceware.org/bugzilla/show_bug.cgi?id=19738
By defining explicit transition times for DST in the TZ environment variable,
the test is now independant to how the system guess those transition times.
Ancestors of 5
4 2 0
Ancestors of 6 and 5
3 4 2 1 0
Ancestors of 5 and 4
4 2 0
Ancestors of 7, stop at 6
6
Ancestors of 7, including revs
7 6 5 3 4 2 1 0
Ancestors of 7, 5 and 3, including revs
7 5 3 6 4 2 1 0
Descendants of 5
7 8
Descendants of 5 and 3
6 7 8
Descendants of 5 and 4
5 7 8