Sync Push Tokens from Client State to DynamoDB

With the introduction of SKD version 2 and the usage of V2 logins it happened for some customers that there is a push token registered in the client state for a specific client (device) but there is no such push token in the related DynamoDB table entry.

In order to fix this issue, it is necessary to synchronize the push tokens for the clients (devices) of customer from the client state table to DynamoDB.

For doing this we created a own script which is located in the me-client service Github repo. The usage of this script is explained in the README file which is located in the same folder.