JCLOUDS-692: Removing CloudSigma v1 features

Follow-on from jclouds/jclouds commit f7aea987
Catching up with provider removal in jclouds core

* bluelock-vcloud-zone01 (7e04f62)
* greenhousedata-element-vcloud (0acc61b)
* ninefold-storage (1d95d29)
* ninefold-compute (1d95d29)
JCLOUDS-742 Removing cloudonestorage feature

Provider was removed in jclouds/jclouds commit 9df0cd24
Removing references to azure-common from the azureblob feature

azure-common was folded into azureblob in jclouds/jclouds 6843e0c
Update jclouds.version to 1.8.1
[maven-release-plugin] prepare release jclouds-karaf-1.8.1-rc1