Avoid warning about 'Sharing is only supported for boot loader classes'

Signed-off-by: Mitch Gaffigan <mitch.gaffigan@comcast.net>

Author: mgaffigan

client/ant-build.xml

@@ -359,6 +359,8 @@
 			<junit haltonfailure="false" fork="true" forkmode="once">
 				<jvmarg value="-Xms128m" />
 				<jvmarg value="-Xmx2048m" />
+				<!-- https://stackoverflow.com/questions/54205486 -->
+				<jvmarg value="-Xshare:off" />
 				<jvmarg value="--add-opens=java.base/jdk.internal.misc=ALL-UNNAMED"/>
 				<jvmarg value="--add-opens=java.sql.rowset/com.sun.rowset=ALL-UNNAMED"/>
 				<jvmarg value="--add-opens=java.sql.rowset/com.sun.rowset.internal=ALL-UNNAMED"/>

command/build.xml

@@ -98,6 +98,8 @@
 			<junit haltonfailure="false" fork="true" forkmode="once">
 				<jvmarg value="-Xms128m" />
 				<jvmarg value="-Xmx2048m" />
+				<!-- https://stackoverflow.com/questions/54205486 -->
+				<jvmarg value="-Xshare:off" />
 				<jvmarg value="--add-opens=java.base/jdk.internal.misc=ALL-UNNAMED"/>
 				<jvmarg value="--add-opens=java.sql.rowset/com.sun.rowset=ALL-UNNAMED"/>
 				<jvmarg value="--add-opens=java.sql.rowset/com.sun.rowset.internal=ALL-UNNAMED"/>

donkey/build.xml

@@ -97,6 +97,8 @@
 			<junit haltonfailure="false" fork="true" forkmode="once">
 				<jvmarg value="-Xms128m" />
 				<jvmarg value="-Xmx2048m" />
+				<!-- https://stackoverflow.com/questions/54205486 -->
+				<jvmarg value="-Xshare:off" />
 				<jvmarg value="--add-opens=java.base/jdk.internal.misc=ALL-UNNAMED"/>
 				<jvmarg value="--add-opens=java.sql.rowset/com.sun.rowset=ALL-UNNAMED"/>
 				<jvmarg value="--add-opens=java.sql.rowset/com.sun.rowset.internal=ALL-UNNAMED"/>