Supress noisy HeadlessException in the logs

[srstsavage]

Currently a noisy but ignorable java.awt.HeadlessException is emitted in the logs when ERDDAP is run in an environment without a display. This should be detected and supressed (or at least made less noisy).

java.awt.HeadlessException
 at java.desktop/sun.java2d.HeadlessGraphicsEnvironment.getDefaultScreenDevice(HeadlessGraphicsEnvironment.java:58)
 at java.desktop/sun.awt.image.SurfaceManager$ImageCapabilitiesGc.isAccelerated(SurfaceManager.java:203)
 at gov.noaa.pfel.coastwatch.sgt.SgtUtil.isBufferedImageAccelerated(SgtUtil.java:350)
 at gov.noaa.pfel.erddap.util.EDStatic.<clinit>(EDStatic.java:1913)
 at gov.noaa.pfel.erddap.Erddap.<init>(Erddap.java:204)
 at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
 at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)
 at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)
 at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:144)
 at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:758)
 at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:575)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:115)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:90)
 at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:483)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:115)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:93)
 at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:731)
 at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:663)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
 at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:389)
 at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:63)
 at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:904)
 at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1741)
 at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:52)
 at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1190)
 at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
 at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:63)
 at java.base/java.lang.Thread.run(Thread.java:1583)

A user asked about this here:

https://groups.google.com/g/erddap/c/qwRw7AvCXRU