RFR (XS) 8191370: Add serviceability agent tests to tier1

[coleen.phillimore at oracle.com]

open webrev at http://cr.openjdk.java.net/~coleenp/8191370.01/webrev
bug link https://bugs.openjdk.java.net/browse/JDK-8191370

Ran mach5 tier1 with and without change and checked the time (and that 
they ran with my change).  See bug for more information.

Christian suggested this change after my last breakage.

thanks,
Coleen