[1.0] Update meta packages

[nicolasmure]

The meta packages for adapters removed on 1.x should be deprecated. The new adapters introduced in 1.x should have their meta packages.

Also, the suggest section of the composer.json file should be updated with the new adapters' metapackages.

To Deprecate

• gaufrette/opencloud-adapter metapackage (adapter removed in [RFR] [1.x] OpenCloud adapter rewrite #533)
  • Deprecate the OpenCloud adapter
  • Deprecate the ObjectStoreFactory (removed in [RFR] [1.x] OpenCloud adapter rewrite #533)

To Create

• gaufrette/openstack-adapter metapackage (adapter introduced in [RFR] [1.x] OpenCloud adapter rewrite #533)
• gaufrette/google-cloud-storage-adapter metapackage (adapter introduced in [RFR] Feature/google cloud client adapter #557)