Fix bug in LiveTradingRealTimeHandler

[Marinovsky]

Description

So far, LiveTradingRealTimeHandler didn't take into consideration holidays nor early closes/late opens when refreshing the market hours for the Securities. In the same way, if certain update to the MHDB(MarketHoursDatabase) was done, it didn't upload its instance of the MHDB. This PR solves those bugs.

Related Issue

Close #7662

Motivation and Context

With this change, users will get accurate market hours for their securities when using LiveTradingRealTimeHandler, even after the MHDB is updated.

Requires Documentation Change

N/A

How Has This Been Tested?

There were created unit tests asserting the market hours assigned to the algorithm's securities took into consideration holidays, early closes and late opens. Additionally, it was asserted that the MHDB reset every time the method RefreshMarketHoursToday() was called.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Refactor (non-breaking change which improves implementation)
• Performance (non-breaking change which improves performance. Please add associated performance test and results)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Non-functional change (xml comments/documentation/etc)

Checklist:

• My code follows the code style of this project.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My branch follows the naming convention bug-<issue#>-<description> or feature-<issue#>-<description>

[jhonabreul]

Thanks! 🚀 Leaving some minor commets here. Shared some others through Slack

[jhonabreul]

Thanks 👍 Looks good. Minor comment shared through Slack