Details field for override reason - max vehicle per campsite

[FatemehMoghadam]

This change is 

[coveralls]

Pull Request Test Coverage Report for Build 485

• 6 of 10 (60.0%) changed or added relevant lines in 4 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.002%) to 48.27%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
parkstay/api.py	1	3	33.33%
parkstay/utils.py	1	3	33.33%

Files with Coverage Reduction	New Missed Lines	%
parkstay/utils.py	1	50.33%
parkstay/models.py	1	54.34%

Totals
Change from base Build 482:	0.002%
Covered Lines:	11454
Relevant Lines:	23729

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💛 - Coveralls

[scottp-dpaw]

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parkstay/models.py, line 503 at r1 (raw file):

    min_people = models.SmallIntegerField(default=1)
    max_people = models.SmallIntegerField(default=12)
    max_vehicles = models.PositiveIntegerField(default=1)

Is the business happy with every existing campsite getting capped at 1 vehicle per booking by default?

[scottp-dpaw]

Reviewed 9 of 9 files at r1.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @FatemehMoghadam)

[scottp-dpaw]

Reviewable status: complete! all files reviewed, all discussions resolved