Provided a pushMirageIntoStore import for tests and one for outside tests

[cah-brian-gantzler]

Exposes a method for the consumer to push mirage's database in the ember data store

If you call this method with no parameters, it will push the entire mirage store into ember store

You may also call this method with an array of resource names. ['accounts', 'accountTypes']. These must
be the resource names camelized.

You may also call it with a hash. This hash will have the resource names as the keys and the values will either
be true (push all records for that resource) or a where hash or function that will be applied to the that resource.
{
accounts: true,
accountTypes: { state: 'OH' }
users: item => item.name.includes("Joe")
}

@param server The mirage server
@param store the store you wish mirage to push to
@param config undefined means push all resources
An array will push only the resources in the array
hash in the form of resource=value Value may be true, all records, or a where hash or function

[cah-brian-gantzler]

Rebased and re-pushed this.

[cah-brian-gantzler]

The linter fails on

Native JS classes should be used instead of classic classes ember/no-classic-classes

Its in my tests. But its the way that MirageJS Documents doing it. Pretty sure you have to use extend because of the way the base class works.

Should we lighten this lint or should I look into turning it off for this one file?