Change maven central URLs to use https: which is now required

Change-Id: I9cbf6319a20900069f697f99a1730a86bfa6eaa5
diff --git a/tools/build/libgen/pom.xml b/tools/build/libgen/pom.xml
index 3cfa162..2f17fa1 100644
--- a/tools/build/libgen/pom.xml
+++ b/tools/build/libgen/pom.xml
@@ -29,7 +29,7 @@
     <groupId>org.onosproject</groupId>
     <artifactId>onos-libgen</artifactId>
     <packaging>jar</packaging>
-    <version>2.2-SNAPSHOT</version>
+    <version>2.2</version>
 
     <description>Third-party library generator for ONOS Bazel workspace</description>
     <url>http://onosproject.org/</url>
diff --git a/tools/build/libgen/src/main/java/org/onosproject/libgen/AetherResolver.java b/tools/build/libgen/src/main/java/org/onosproject/libgen/AetherResolver.java
index 23ffc9e..62d23cc 100755
--- a/tools/build/libgen/src/main/java/org/onosproject/libgen/AetherResolver.java
+++ b/tools/build/libgen/src/main/java/org/onosproject/libgen/AetherResolver.java
@@ -59,7 +59,7 @@
  * Resolver capable of resolving Maven coordinates to a Maven artifact.
  */
 public class AetherResolver {
-    private static final String CENTRAL_URL = "http://repo1.maven.org/maven2/";
+    private static final String CENTRAL_URL = "https://repo1.maven.org/maven2/";
 
     private static RepositorySystem system;
     private static RepositorySystemSession session;
diff --git a/tools/build/libgen/src/main/java/org/onosproject/libgen/BazelArtifact.java b/tools/build/libgen/src/main/java/org/onosproject/libgen/BazelArtifact.java
index ae13b56..1f935a8 100644
--- a/tools/build/libgen/src/main/java/org/onosproject/libgen/BazelArtifact.java
+++ b/tools/build/libgen/src/main/java/org/onosproject/libgen/BazelArtifact.java
@@ -184,7 +184,7 @@
 
         @Override
         String httpUrl() {
-            return "http://repo1.maven.org/maven2/" +
+            return "https://repo1.maven.org/maven2/" +
                     artifact.getGroupId().replace(".", "/") +
                     "/" + artifact.getArtifactId() +
                     "/" + artifact.getVersion() +
diff --git a/tools/build/onos-lib-gen b/tools/build/onos-lib-gen
index 7e6c951..321fe84 100755
--- a/tools/build/onos-lib-gen
+++ b/tools/build/onos-lib-gen
@@ -9,7 +9,7 @@
 cd $ONOS_ROOT
 
 REPO=${M2_REPO:-~/.m2/repository}
-VER=2.1
+VER=2.2
 ARTIFACT=org/onosproject/onos-libgen/$VER/onos-libgen-$VER.jar
 JAR=$REPO/$ARTIFACT
 
@@ -17,7 +17,7 @@
 if [ ! -f $JAR ]; then
     printf "Downloading onos-libgen-$VER.jar..."
     mkdir -p $(dirname $JAR)
-    curl http://repo1.maven.org/maven2/$ARTIFACT > $JAR
+    curl https://repo1.maven.org/maven2/$ARTIFACT > $JAR
     [ -f $JAR ] && printf "Done.\n"
 fi