David Pilato 3f71772cd2 Azure snapshots can not be restored anymore (#26778)
While working on #26751 and doing some manual integration testing I found that this #22858 removed an important line of our code:

`AzureRepository` overrides default `initializeSnapshot` method which creates metadata files and do other stuff.

But with PR #22858, I wrote:

```java
    @Override
    public void initializeSnapshot(SnapshotId snapshotId, List<IndexId> indices, MetaData clusterMetadata) {
        if (blobStore.doesContainerExist(blobStore.container()) == false) {
            throw new IllegalArgumentException("The bucket [" + blobStore.container() + "] does not exist. Please create it before " +
                " creating an azure snapshot repository backed by it.");
        }
    }
```

instead of

```java
    @Override
    public void initializeSnapshot(SnapshotId snapshotId, List<IndexId> indices, MetaData clusterMetadata) {
        if (blobStore.doesContainerExist(blobStore.container()) == false) {
            throw new IllegalArgumentException("The bucket [" + blobStore.container() + "] does not exist. Please create it before " +
                " creating an azure snapshot repository backed by it.");
        }
        super.initializeSnapshot(snapshotId, indices, clusterMetadata);
    }
```

As we never call `super.initializeSnapshot(...)` files are not created and we can't restore what we saved.

Closes #26777.
2017-09-25 14:35:27 -04:00
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