checking incorrect delegation ptr behaviour

The release fixes the UB of working with unintialized structure. This cause some delegations not being released correctly. This priblem will be examined and solved soon in the nearest commits.

Node infrastructure update

• Java - executor update
• Node settings for executor correct work

mainnet-4.2.531.15

• Estimation of node delegator's reward
• Quick start with smart contracts and node's stat functionality
• API update

mainnet-4.2.530.1

Reward parameters correct update for quick start

mainnet-4.2.530.0

Balance update fix
Quick start update for node with reward functionality

mainnet-4.2.529.6

Mainnet node with block reward functionality support

mainnet-4.2.528.3

Update README.md

mainnet-4.2.528.1

Mainnet-4.2.528.1

mainnet-4.2.528.0

Mainnet-4.2.528.0

mainnet-4.2.527.2

mainnet-4.2.527.2