Revert to using individual azure libraries

xref: https://github.com/CloudVE/cloudbridge/issues/134

setup.py

@@ -24,7 +24,19 @@ REQS_BASE = [
     'tenacity>=4.12.0'
 ]
 REQS_AWS = ['boto3']
-REQS_AZURE = ['azure',
+# Install azure>=3.0.0 package to find which of the azure libraries listed
+# below are compatible with each other. List individual libraries instead
+# of using the azure umbrella package to speed up installation.
+REQS_AZURE = ['msrest>=0.5.4',
+              'msrestazure>=0.5.0',
+              'azure-common>=1.1.14',
+              'azure-mgmt-devtestlabs>=2.2.0',
+              'azure-mgmt-resource>=2.0.0',
+              'azure-mgmt-compute>=4.0.1',
+              'azure-mgmt-network>=2.0.1',
+              'azure-mgmt-storage>=2.0.0',
+              'azure-storage-blob>=1.3.1',
+              'azure-cosmosdb-table>=1.0.4',
               'pysftp>=0.2.9']
 REQS_OPENSTACK = [
     'openstacksdk>=0.12.0',