Syncing node crashes after reconfiguring generators

[has5aan]

Expected behavior

A node previously configured as a syncing node should not crash once reconfigured with generators.

Actual behavior

A node previously configured as a syncing node crashes once it is reconfigured with generators, reporting err=Execution context is already initialized with {context id} thrown from ABIHandler.initStateMachine()

Steps to reproduce

Launch two nodes, one generator and one syncing, after a certain amount of blocks, reconfigure syncing nodes with generators, relaunch the syncing node and after random block generation

Which version(s) does this affect? (Environment, OS, etc...)

Lisk SDK development branch.