#198 HAQQ Mainnet v1.7.5 Upgrade

External code audit highlighted non-critical issues with LiquidVesting module. At the same time, it's not being used by the community as much as we anticipated when the module has been introduced (less than 20 liquid vesting positions has been created) which makes it unjustified to keep maintaining the module at this time, while there are more important node features to be implemented by the core team, such as Shariah Oracle and Evergreen DAO.\n\nAs a result, we propose to disable the LiquidVesting module until: \n1. Haqq core team has a capacity to polish the module.\n2. Community shows actual demand for this feature.\n\nAdditionally, this software upgrade contains spelling-related refactoring in the module source code which doesn't affect any logic.