[EDH-2601] - SUPPLY agreement can start earlier, than GRID agreement

[EinarArro]

Description

By the business rules, SUPPLY agreement's validFrom cannot be earlier, than GRID agreements's validFrom. But I was able to bypass that rule.

Steps

• Create new metering point
• Create new GRID agreement the way, that it starts somewhere far in the future (in my case next month)
• Create new SUPPLY agreement the way, that it starts sooner, than GRID agreement
• Expected result - error message
• Actual result - SUPPLY agreement is created and balance_state rows also:

[elinasirk]

This issue is solved