Use `package_revise` instead of `resource_create`

[paulmueller]

Affected code:

DCOR-Aid/dcoraid/upload/dataset.py

Lines 70 to 80 in 71097d9

	# Attempt upload
	e = MultipartEncoder(fields={
	'package_id': dataset_id,
	'name': resource_name,
	'upload': (resource_name, path.open('rb'))})
	m = MultipartEncoderMonitor(e, monitor_callback)
	# perform upload
	data = api.post("resource_create",
	data=m,
	dump_json=False,
	headers={"Content-Type": m.content_type})

Using package_revise instead of resource_create was @wardi's suggestion in the ckan gitter.im chat. package_revise can be used with the __extend syntax to support file uploads.

The original problem were race conditions when resources were added and at the same time package_revise was called from other threads. package_revise should be atomic if and only if only package_revise is used.

[paulmueller]

ckan/ckanapi#181

[paulmueller]

In 4db9a95, a temporary workaround for failing tests or hanging "online" states is implemented. If package_revise works, then everything will be much more efficient.

[paulmueller]

Package revise works now. However, the server-side implementation is still pending. Currently, I am using a workaround for ckan/ckan#2949 and manually call after_create and generate the resource views (see ckan/ckan#6472).