Configure proxy when publishing build info (#629)

Author: vitali-kr

build-info-extractor-gradle/src/main/groovy/org/jfrog/gradle/plugin/artifactory/task/DeployTask.java

@@ -130,6 +130,7 @@ private void handleBuildInfoDeployment(ArtifactoryClientConfiguration accRoot, B
                     accRoot.publisher.getPassword(),
                     new GradleClientLogger(log))) {
 
+                configureProxy(accRoot, artifactoryManager);
                 if (isPublishBuildInfo(accRoot)) {
                     // If export property set always save the file before sending it to artifactory
                     exportBuildInfo(buildInfo, getExportFile(accRoot));