Merge configuration files after updating node to 4.5.0 or higher

**Bug Description**
Users who are updating nodes on Windows have to backup configuration file and manually update the new file because every time users update to the new version of the node, configuration file gets overwritten.

This leads to some difficulties as for example, new configuration that comes with 4.5.x contains sections that enables GRPC V2 and if user just replaces new configuration file with configuration backup file, GRPC V2 will not be enabled.

**Steps to Reproduce**
Update node from 4.4 to 4.5.

**Expected Result**
Configuration should be merged.

**Actual Result**
Configuration gets overwritten

**Versions**
- Software Version: 4.4 and 4.5
- OS: Windows specific.