Bazel: Add additional Maven repositories

Some plugins, most notably github-plugin, depend on additional Maven
repositories. Extend the list of supported Maven repositories, to
seamlessly support them in maven_jar macro.

Release-Notes: skip
Change-Id: I12af64b04525e38ccc1a7d9303c93a97b6508ee3

tools/util.py

diff --git a/tools/util.py b/tools/util.py
index 947e2c0..aed9e91 100644
--- a/tools/util.py
+++ b/tools/util.py
@@ -16,8 +16,10 @@
 
 REPO_ROOTS = {
   'ECLIPSE': 'https://repo.eclipse.org/content/groups/releases',
+  'ECLIPSE_EGIT': 'https://repo.eclipse.org/content/repositories/egit-releases',
   'GERRIT': 'https://gerrit-maven.storage.googleapis.com',
   'GERRIT_API': 'https://gerrit-api.commondatastorage.googleapis.com/release',
+  'JENKINS': 'https://repo.jenkins-ci.org/artifactory/public',
   'MAVEN_CENTRAL': 'https://repo1.maven.org/maven2',
   'MAVEN_LOCAL': 'file://' + path.expanduser('~/.m2/repository'),
   'MAVEN_SNAPSHOT': 'https://oss.sonatype.org/content/repositories/snapshots',