[ZEPPELIN-3710] Add to the SAP documentation limit and distinct description
[ZEPPELIN-3710] Add to the SAP documentation limit and distinct description

### What is this PR for?
Add to the SAP documentation `limit` and `distinct` keywords description which have been added in [ZEPPELIN-3677](https://github.com/apache/zeppelin/pull/3106)

### What type of PR is it?
Improvement

### What is the Jira issue?
[ZEPPELIN-3710](https://issues.apache.org/jira/browse/ZEPPELIN-3710)

### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? Updated

Author: oxygen311 <alex39-09@mail.ru>

Closes #3138 from oxygen311/ZEPPELIN-3710 and squashes the following commits:

77ffd47e3 [oxygen311] Add SAP Docs

joroKr21/incubator-zeppelin,zjffdu/zeppelin,fogbeam/zeppelin_mirror,zetaris/zeppelin,hammertank/zeppelin,zetaris/zeppelin,sergeymazin/zeppelin,hammertank/zeppelin,fogbeam/zeppelin_mirror,Leemoonsoo/zeppelin,joroKr21/incubator-zeppelin,prabhjyotsingh/zeppelin,zetaris/zeppelin,Leemoonsoo/zeppelin,mwkang/zeppelin,sergeymazin/zeppelin,apache/zeppelin,apache/zeppelin,hammertank/zeppelin,Leemoonsoo/zeppelin,prabhjyotsingh/zeppelin,prabhjyotsingh/zeppelin,apache/incubator-zeppelin,cquptEthan/incubator-zeppelin,cquptEthan/incubator-zeppelin,mwkang/zeppelin,sergeymazin/zeppelin,apache/incubator-zeppelin,cquptEthan/incubator-zeppelin,jongyoul/zeppelin,apache/incubator-zeppelin,karuppayya/zeppelin,jongyoul/incubator-zeppelin,apache/incubator-zeppelin,jongyoul/zeppelin,VipinRathor/zeppelin,prabhjyotsingh/incubator-zeppelin,jongyoul/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,mwkang/zeppelin,cquptEthan/incubator-zeppelin,zjffdu/zeppelin,zjffdu/zeppelin,zjffdu/zeppelin,apache/incubator-zeppelin,mwkang/zeppelin,sergeymazin/zeppelin,Leemoonsoo/zeppelin,prabhjyotsingh/incubator-zeppelin,jongyoul/zeppelin,prabhjyotsingh/zeppelin,joroKr21/incubator-zeppelin,fogbeam/zeppelin_mirror,prabhjyotsingh/zeppelin,VipinRathor/zeppelin,prabhjyotsingh/incubator-zeppelin,datalayer/zeppelin-datalayer,apache/zeppelin,karuppayya/zeppelin,zetaris/zeppelin,prabhjyotsingh/incubator-zeppelin,jongyoul/incubator-zeppelin,joroKr21/incubator-zeppelin,apache/zeppelin,cquptEthan/incubator-zeppelin,cquptEthan/incubator-zeppelin,prabhjyotsingh/zeppelin,fogbeam/zeppelin_mirror,prabhjyotsingh/zeppelin,VipinRathor/zeppelin,Leemoonsoo/incubator-zeppelin,jongyoul/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,Leemoonsoo/zeppelin,joroKr21/incubator-zeppelin,karuppayya/zeppelin,fogbeam/zeppelin_mirror,hammertank/zeppelin,Leemoonsoo/incubator-zeppelin,karuppayya/zeppelin,Leemoonsoo/zeppelin,karuppayya/zeppelin,apache/zeppelin,fogbeam/zeppelin_mirror,hammertank/zeppelin,joroKr21/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,jongyoul/zeppelin,jongyoul/zeppelin,zjffdu/zeppelin,mwkang/zeppelin,Leemoonsoo/incubator-zeppelin,apache/incubator-zeppelin,Leemoonsoo/zeppelin,apache/zeppelin,zjffdu/zeppelin,Leemoonsoo/incubator-zeppelin,jongyoul/incubator-zeppelin,sergeymazin/zeppelin,zetaris/zeppelin,datalayer/zeppelin-datalayer,karuppayya/zeppelin,cquptEthan/incubator-zeppelin,mwkang/zeppelin,VipinRathor/zeppelin,jongyoul/zeppelin,mwkang/zeppelin,karuppayya/zeppelin,datalayer/zeppelin-datalayer,VipinRathor/zeppelin,jongyoul/incubator-zeppelin,apache/zeppelin,joroKr21/incubator-zeppelin,VipinRathor/zeppelin,zjffdu/zeppelin,zetaris/zeppelin,joroKr21/incubator-zeppelin,VipinRathor/zeppelin,jongyoul/zeppelin,hammertank/zeppelin,Leemoonsoo/zeppelin,zetaris/zeppelin,fogbeam/zeppelin_mirror,hammertank/zeppelin,datalayer/zeppelin-datalayer,sergeymazin/zeppelin,prabhjyotsingh/incubator-zeppelin,sergeymazin/zeppelin