gst calculation issue fixed

[FatemehMoghadam]

please check!

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This change is 

[scottp-dpaw]

ledger/payments/invoice/dashboard/views.py, line 29 at r1 (raw file):

    def get_context_data(self, **kwargs):
        ctx = super(InvoiceDetailView, self).get_context_data(**kwargs)
        ctx['bpay_allowed'] = settings.BPAY_ALLOWED

As discussed, need to add settings.INVOICE_UNPAID_WARNING to the context (just like with bpay_allowed) for the template to work

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Comments from Reviewable

[coveralls]

Pull Request Test Coverage Report for Build 416

• 2 of 15 (13.33%) changed or added relevant lines in 4 files are covered.
• 3 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-0.004%) to 43.39%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
ledger/checkout/views.py	1	3	33.33%
ledger/payments/invoice/dashboard/views.py	0	2	0.0%
ledger/payments/utils.py	1	3	33.33%
parkstay/utils.py	0	7	0.0%

Files with Coverage Reduction	New Missed Lines	%
ledger/checkout/views.py	1	17.62%
ledger/payments/invoice/dashboard/views.py	1	76.0%
parkstay/api.py	1	16.79%

Totals
Change from base Build 414:	-0.004%
Covered Lines:	10279
Relevant Lines:	23690

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💛 - Coveralls

[scottp-dpaw]

Reviewed 8 of 9 files at r1, 1 of 1 files at r2.
Review status: all files reviewed at latest revision, all discussions resolved.

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Comments from Reviewable