README: silently revert project logo

Reverts project logo in README.md without raising any attention,
coverity project has been removed by their parent sponsor add badges
from sonarcloud instead for static analysis.

Signed-off-by: Rohit Yadav <[email protected]>

Author: rohityadavcloud

README.md

@@ -1,6 +1,6 @@
-# Apache CloudStack [![Build Status](https://travis-ci.org/apache/cloudstack.svg?branch=master)](https://travis-ci.org/apache/cloudstack) [![Coverity Scan Build Status](https://scan.coverity.com/projects/943/badge.svg)](https://scan.coverity.com/projects/943)
+# Apache CloudStack [![Build Status](https://travis-ci.org/apache/cloudstack.svg?branch=master)](https://travis-ci.org/apache/cloudstack) [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=apachecloudstack&metric=alert_status)](https://sonarcloud.io/dashboard?id=apachecloudstack) [![Lines of Code](https://sonarcloud.io/api/project_badges/measure?project=apachecloudstack&metric=ncloc)](https://sonarcloud.io/dashboard?id=apachecloudstack)
 
-![Apache CloudStack](tools/logo/acsxmas.jpg)
+![Apache CloudStack](tools/logo/apache_cloudstack.png)
 
 Apache CloudStack is open source software designed to deploy and manage large
 networks of virtual machines, as a highly available, highly scalable