Add SSIS to SQL install

Problem:  I installed a dedicated database server for SSRS using SQL Server 2012 but I did not add the SQL Server Integration Services (SSIS). 

Steps to Add SSIS:

1.> Verify SSIS is missing from the Database Servers.    Tip: SSIS is 1 per machine, not instance based.

2.> Run the installation binaries/SQL Server Installation Centre and follow the instructions below