[FEATURE] CreateIndexMappings API - add support for index pattern

**Is your feature request related to a problem?**
CreateIndexMappings API now supports only concrete index as index_name parameter.

**What solution would you like?**
We need to be able to pass index pattern as index_name parameter. 

For example: 
```
{
    "index_name": "my_index*",
    "rule_topic": "netflow"
}
```

fixes #217 