1.4 - Do not call into the VM unless the VM Context has been created. (#24)

* Ensure that the in VM Context is created before onDone is called.

Signed-off-by: John Plevyak <jplevyak@gmail.com>

* Update as per offline discussion.

Signed-off-by: John Plevyak <jplevyak@gmail.com>

* Set in_vm_context_created_ in onNetworkNewConnection.

Signed-off-by: John Plevyak <jplevyak@gmail.com>

* Add guards to other network calls.

Signed-off-by: John Plevyak <jplevyak@gmail.com>

* Fix common/wasm tests.

Signed-off-by: John Plevyak <jplevyak@gmail.com>

* Patch tests.

Signed-off-by: John Plevyak <jplevyak@gmail.com>

* Remove unecessary file from cherry-pick.

Signed-off-by: John Plevyak <jplevyak@gmail.com>