Fix List containers

[lmazuel]

This PR #5562 suggests that list containers is pageable, this is fixing the missing declaration if that's the case

[openapi-sdkautomation]

SDK Automation [Logs] (Generated from ce8723e)

Python: Azure/azure-sdk-for-python

• Package generation pending.

Java: Azure/azure-sdk-for-java

• Package generation pending.

Go: Azure/azure-sdk-for-go

• Package generation pending.

JavaScript: Azure/azure-sdk-for-js

• Package generation pending.

Ruby: Azure/azure-sdk-for-ruby

• Package generation pending.

[AutorestCI]

Automation for azure-sdk-for-java

Encountered a Subprocess error: (azure-sdk-for-java)

Command: ['/usr/local/bin/autorest', '/tmp/tmplz4od8fn/rest/specification/storage/resource-manager/readme.md', '--perform-load=false', '--swagger-to-sdk', '--output-artifact=configuration.json', '--input-file=foo', '--output-folder=/tmp/tmprfcwj08h']
Finished with return code 7
and output:

AutoRest code generation utility [version: 2.0.4283; node: v8.12.0]
(C) 2018 Microsoft Corporation.
https://aka.ms/autorest
Failure:
Error: Unable to start AutoRest Core from /root/.autorest/@microsoft.azure_autorest-core@2.0.4373/node_modules/@microsoft.azure/autorest-core
Error: Unable to start AutoRest Core from /root/.autorest/@microsoft.azure_autorest-core@2.0.4373/node_modules/@microsoft.azure/autorest-core
    at main (/opt/node_modules/autorest/dist/app.js:232:19)
    at <anonymous>

/root/.autorest/@microsoft.azure_autorest-core@2.0.4373/node_modules/@microsoft.azure/autorest-core/dist/app.js:33
    autorest_core_1.Shutdown();
    ^
ReferenceError: autorest_core_1 is not defined
    at process.on (/root/.autorest/@microsoft.azure_autorest-core@2.0.4373/node_modules/@microsoft.azure/autorest-core/dist/app.js:33:5)
    at emitOne (events.js:121:20)
    at process.emit (events.js:211:7)
    at process.emit (/node_modules/source-map-support/source-map-support.js:439:21)
fs.js:612
  return binding.close(fd);
                 ^

Error: EBADF: bad file descriptor, close
    at Object.fs.closeSync (fs.js:612:18)
    at StaticVolumeFile.shutdown (/opt/node_modules/autorest/dist/static-loader.js:352:10)
    at StaticFilesystem.shutdown (/opt/node_modules/autorest/dist/static-loader.js:406:17)
    at process.exit.n [as exit] (/opt/node_modules/autorest/dist/static-loader.js:169:11)
    at printErrorAndExit (/node_modules/source-map-support/source-map-support.js:423:11)
    at process.emit (/node_modules/source-map-support/source-map-support.js:435:16)
    at process._fatalException (bootstrap_node.js:391:26)

[AutorestCI]

Automation for azure-sdk-for-python

The initial PR has been merged into your service PR:
Azure/azure-sdk-for-python#5713

[AutorestCI]

Automation for azure-sdk-for-ruby

Nothing to generate for azure-sdk-for-ruby

[AutorestCI]

Automation for azure-sdk-for-go

The initial PR has been merged into your service PR:
Azure/azure-sdk-for-go#4998

[AutorestCI]

Automation for azure-sdk-for-js

The initial PR has been merged into your service PR:
Azure/azure-sdk-for-js#3712

[azuresdkci]

Can one of the admins verify this patch?