Limit Mode150-CS on xlinux for extended MiniMix_3h

Enable Mode 501 for all platforms.
Limit Mode150-CS on xlinux

Author: annaibm

system/otherLoadTest/playlist.xml

@@ -182,6 +182,13 @@
 	</test>
 	<test>
 		<testCaseName> MiniMix_extended_3h</testCaseName>
+		<disables>
+			<disable>
+				<comment>https://github.ibm.com/runtimes/backlog/issues/597</comment>
+				<variation>Mode150-CS</variation>
+				<platform>^(?!x86-64_linux$).*</platform>
+			</disable>
+		 </disables>
 		<variations>
 			<variation>Mode501</variation>
 			<variation>Mode150-CS</variation>