[ZEPPELIN-2975] Fix e2e CI test profile
[ZEPPELIN-2975] Fix e2e CI test profile

### What is this PR for?
e2e CI test profile is failing after merge https://github.com/apache/zeppelin/pull/2569.
There were [css class list change] for paragraph add button element.
That results e2e test unable to locate the button element.

### What type of PR is it?
Bug Fix

### Todos
* [x] - Fix

### What is the Jira issue?
https://issues.apache.org/jira/browse/ZEPPELIN-2975

### How should this be tested?
CI green

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

Author: Lee moon soo <moon@apache.org>

Closes #2609 from Leemoonsoo/fix/ci_selenium and squashes the following commits:

55ed404 [Lee moon soo] locate add paragraph button correctly after https://github.com/apache/zeppelin/pull/2569

prabhjyotsingh/zeppelin,datalayer/zeppelin-datalayer,VipinRathor/zeppelin,zetaris/zeppelin,prabhjyotsingh/zeppelin,Leemoonsoo/zeppelin,astroshim/zeppelin,prabhjyotsingh/zeppelin,lresende/incubator-zeppelin,karuppayya/zeppelin,namanmishra91/zeppelin,apache/zeppelin,joroKr21/incubator-zeppelin,zetaris/zeppelin,apache/incubator-zeppelin,astroshim/incubator-zeppelin,cquptEthan/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,wary/zeppelin,yu74n/zeppelin,namanmishra91/zeppelin,herval/zeppelin,cquptEthan/incubator-zeppelin,tinkoff-dwh/zeppelin,joroKr21/incubator-zeppelin,r-kamath/incubator-zeppelin,fogbeam/zeppelin_mirror,r-kamath/zeppelin,anthonycorbacho/incubator-zeppelin,astroshim/incubator-zeppelin,doanduyhai/incubator-zeppelin,tzolov/incubator-zeppelin,sergeymazin/zeppelin,lresende/incubator-zeppelin,r-kamath/incubator-zeppelin,pellmont/zeppelin,jongyoul/incubator-zeppelin,namanmishra91/zeppelin,doanduyhai/incubator-zeppelin,r-kamath/incubator-zeppelin,hammertank/zeppelin,fogbeam/zeppelin_mirror,astroshim/incubator-zeppelin,doanduyhai/incubator-zeppelin,jongyoul/zeppelin,VipinRathor/zeppelin,fogbeam/zeppelin_mirror,joroKr21/incubator-zeppelin,mwkang/zeppelin,tzolov/incubator-zeppelin,datalayer/zeppelin,jongyoul/zeppelin,hammertank/zeppelin,apache/zeppelin,apache/incubator-zeppelin,datalayer/zeppelin,apache/incubator-zeppelin,astroshim/zeppelin,Leemoonsoo/zeppelin,prabhjyotsingh/incubator-zeppelin,prabhjyotsingh/zeppelin,astroshim/zeppelin,hammertank/zeppelin,herval/zeppelin,hammertank/zeppelin,apache/zeppelin,karuppayya/zeppelin,herval/zeppelin,zetaris/zeppelin,jongyoul/incubator-zeppelin,sravan-s/zeppelin,sravan-s/zeppelin,datalayer/zeppelin,pellmont/zeppelin,hammertank/zeppelin,zetaris/zeppelin,apache/incubator-zeppelin,jongyoul/zeppelin,datalayer/zeppelin,wary/zeppelin,namanmishra91/zeppelin,lresende/incubator-zeppelin,pellmont/zeppelin,tinkoff-dwh/zeppelin,astroshim/incubator-zeppelin,sravan-s/zeppelin,anthonycorbacho/incubator-zeppelin,datalayer/zeppelin-datalayer,r-kamath/zeppelin,Leemoonsoo/incubator-zeppelin,namanmishra91/zeppelin,mwkang/zeppelin,zjffdu/zeppelin,vipul1409/zeppelin,jongyoul/zeppelin,wary/zeppelin,r-kamath/zeppelin,fogbeam/zeppelin_mirror,pellmont/zeppelin,mwkang/zeppelin,lresende/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,sergeymazin/zeppelin,sergeymazin/zeppelin,Leemoonsoo/zeppelin,r-kamath/zeppelin,lresende/incubator-zeppelin,VipinRathor/zeppelin,apache/incubator-zeppelin,Leemoonsoo/zeppelin,zetaris/zeppelin,prabhjyotsingh/incubator-zeppelin,yu74n/zeppelin,r-kamath/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,prabhjyotsingh/zeppelin,datalayer/zeppelin,pellmont/zeppelin,fogbeam/zeppelin_mirror,apache/zeppelin,tinkoff-dwh/zeppelin,zetaris/zeppelin,wary/zeppelin,pellmont/zeppelin,vipul1409/zeppelin,joroKr21/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,tzolov/incubator-zeppelin,zjffdu/zeppelin,Leemoonsoo/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,astroshim/zeppelin,cquptEthan/incubator-zeppelin,karuppayya/zeppelin,yu74n/zeppelin,sravan-s/zeppelin,doanduyhai/incubator-zeppelin,sergeymazin/zeppelin,cquptEthan/incubator-zeppelin,tinkoff-dwh/zeppelin,VipinRathor/zeppelin,hammertank/zeppelin,anthonycorbacho/incubator-zeppelin,datalayer/zeppelin,datalayer/zeppelin,r-kamath/incubator-zeppelin,herval/zeppelin,joroKr21/incubator-zeppelin,doanduyhai/incubator-zeppelin,herval/zeppelin,karuppayya/zeppelin,r-kamath/zeppelin,anthonycorbacho/incubator-zeppelin,yu74n/zeppelin,zjffdu/zeppelin,zjffdu/zeppelin,lresende/incubator-zeppelin,karuppayya/zeppelin,astroshim/zeppelin,vipul1409/zeppelin,apache/zeppelin,cquptEthan/incubator-zeppelin,karuppayya/zeppelin,r-kamath/zeppelin,tzolov/incubator-zeppelin,tinkoff-dwh/zeppelin,sravan-s/zeppelin,astroshim/zeppelin,yu74n/zeppelin,tinkoff-dwh/zeppelin,mwkang/zeppelin,joroKr21/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,apache/zeppelin,vipul1409/zeppelin,zjffdu/zeppelin,VipinRathor/zeppelin,fogbeam/zeppelin_mirror,wary/zeppelin,lresende/incubator-zeppelin,zjffdu/zeppelin,VipinRathor/zeppelin,hammertank/zeppelin,Leemoonsoo/zeppelin,Leemoonsoo/zeppelin,sergeymazin/zeppelin,jongyoul/incubator-zeppelin,mwkang/zeppelin,jongyoul/zeppelin,r-kamath/incubator-zeppelin,mwkang/zeppelin,fogbeam/zeppelin_mirror,jongyoul/incubator-zeppelin,Leemoonsoo/zeppelin,joroKr21/incubator-zeppelin,tzolov/incubator-zeppelin,joroKr21/incubator-zeppelin,doanduyhai/incubator-zeppelin,mwkang/zeppelin,jongyoul/zeppelin,sravan-s/zeppelin,doanduyhai/incubator-zeppelin,prabhjyotsingh/zeppelin,tzolov/incubator-zeppelin,vipul1409/zeppelin,zjffdu/zeppelin,herval/zeppelin,wary/zeppelin,jongyoul/zeppelin,vipul1409/zeppelin,astroshim/zeppelin,Leemoonsoo/incubator-zeppelin,tinkoff-dwh/zeppelin,sergeymazin/zeppelin,datalayer/zeppelin-datalayer,sergeymazin/zeppelin,cquptEthan/incubator-zeppelin,herval/zeppelin,zetaris/zeppelin,yu74n/zeppelin,datalayer/zeppelin-datalayer,jongyoul/incubator-zeppelin,wary/zeppelin,sravan-s/zeppelin,VipinRathor/zeppelin,apache/zeppelin,karuppayya/zeppelin,namanmishra91/zeppelin,pellmont/zeppelin,prabhjyotsingh/zeppelin,yu74n/zeppelin,jongyoul/incubator-zeppelin,astroshim/incubator-zeppelin,Leemoonsoo/zeppelin,Leemoonsoo/incubator-zeppelin,r-kamath/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,namanmishra91/zeppelin,cquptEthan/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,vipul1409/zeppelin,apache/incubator-zeppelin,astroshim/incubator-zeppelin,r-kamath/zeppelin