Update time parsing in merge-tops-bursts.py

[jacquelynsmale]

Update time parsing as suggested by issue 212.

[github-actions]

Coverage Report

File	Stmts	Miss	Cover	Missing
/home/runner/micromamba/envs/hyp3-isce2/lib/python3.11/site-packages/hyp3_isce2
__main__.py	26	2	92%	33, 44
burst.py	250	55	78%	98–101, 114–119, 133–148, 164–173, 187–197, 255, 303–311, 331–345, 583–585, 611
dem.py	53	3	94%	101–110
insar_stripmap.py	69	42	39%	38–91, 95–97, 114–133
insar_tops.py	57	30	47%	49–87, 110–132
insar_tops_burst.py	232	178	23%	91–163, 175–201, 231–314, 326–328, 341–439, 463–479, 515–599
logger.py	4	1	75%	9
merge_tops_bursts.py	629	95	85%	184, 201, 263, 268, 325, 341, 349, 381, 385, 471, 498, 576, 616–634, 683–691, 715, 720, 779, 802, 946, 1129–1149, 1164–1177, 1191–1217, 1228–1231, 1236–1249, 1253
s1_auxcal.py	21	2	90%	51, 59
slc.py	34	10	71%	22–25, 29–34
stripmapapp_alos.py	50	7	86%	102, 138, 141–146
topsapp.py	70	8	89%	77, 107, 129–135
utils.py	210	10	95%	114–125, 130, 236, 252–254, 261, 401, 446
water_mask.py	59	5	92%	88, 100–103
TOTAL	1790	448	75%

Tests	Skipped	Failures	Errors	Time
85	0 💤	0 ❌	0 🔥	32.705s ⏱️

[forrestfwilliams]

I also added --overwrite to the gdal_calc.py call in water_mask.py. Without this, test_water_mask.py would fail if you had previously run the tests locally because it wasn't able to overwrite the generated test files.