`loadTask` - expand options

[sevenbitbyte]

Support additional parameters:

• type
• id
• initialContext

1. Verify type task is valid
2. If no id supplied name will be same as type
3. If id is supplied name will be id
4. initialContext will be supplied to the constructor as part of the context

dataparty-api/src/service/service-runner-node.js

Lines 84 to 112 in fc7be3f

	async loadTask(name){
	if(this.tasks[name]){
	return
	}
	debug('loadTask', name, 'useNative =',this.useNative)
	let dt = new DeltaTime().start()
	"use strict"
	let task=null
	let TaskClass = null
	if(!this.useNative){
	const build = Hoek.reach(this.service, `compiled.tasks.${name}`)
	TaskClass = eval(build.code/*, build.map*/)
	}
	else{
	TaskClass = this.service.constructors.tasks[name]
	}
	task = new TaskClass({
	context:{
	party: this.party,
	serviceRunner: this
	}
	})