8263167: IGV: build fails with "taskdef AutoUpdate cannot be found"

Update IGV build configuration to use the nbm-maven-harness Maven artifact.

Reviewed-by: chagedorn, rrich

Author: robcasloz

src/utils/IdealGraphVisualizer/nbproject/platform.properties

@@ -6,7 +6,7 @@ disabled.modules=
 nbplatform.active.dir=${suite.dir}/nbplatform
 nbplatform.default.netbeans.dest.dir=${suite.dir}/nbplatform
 nbplatform.default.harness.dir=${nbplatform.default.netbeans.dest.dir}/harness
-bootstrap.url=http://bits.netbeans.org/dev/nbms-and-javadoc/lastSuccessfulBuild/artifact/nbbuild/netbeans/harness/tasks.jar
+bootstrap.url=https://repo.maven.apache.org/maven2/org/codehaus/mojo/nbm-maven-harness/7.4/nbm-maven-harness-7.4.jar
 autoupdate.catalog.url=https://updates.netbeans.org/netbeans/updates/7.4/uc/final/distribution/catalog.xml.gz
 suite.dir=${basedir}
 nbplatform.active=default