BS-10207 : Update Studio to use tomcat 7 bundle

- Change the value of the variable tomcat.version by 7.0.55
BS-10207 : Update Studio to use tomcat 7 bundle

- In BOSWebServerManager, change the value of the variables TOMCAT_SERVER_TYPE & TOMCAT_RUNTIME_TYPE to use Tomcat 7
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Merge branch 'master' into 'BS-10196_Bundles_upgrade'
Merge branch 'BS-10196_Bundles_upgrade' into 'master'