Fix maven central http(s) issues

ci/jipconf_subst.py

@@ -11,6 +11,6 @@ uri={0}/.m2/repository/
 type=local
 
 [repos:central]
-uri=http://repo1.maven.org/maven2/
+uri=https://repo1.maven.org/maven2/
 type=remote
 """.format(dist), file=out)

ci/mvnget.sh

@@ -9,6 +9,6 @@ _PATH=${GROUP_ID/./\/}/$ARTIFACT_NAME
 _ARTIFACT_SPEC_BASENAME=${NON_GROUP_ID/:/-}
 VERSION=${ARTIFACT_SPEC##*:}
 echo "Downloading ${ARTIFACT_NAME} version ${VERSION} group id ${GROUP_ID}..." >&2
-wget http://search.maven.org/remotecontent?filepath=${_PATH}/$VERSION/${_ARTIFACT_SPEC_BASENAME}.jar -O ${_ARTIFACT_SPEC_BASENAME}.jar
+wget https://search.maven.org/remotecontent?filepath=${_PATH}/$VERSION/${_ARTIFACT_SPEC_BASENAME}.jar -O ${_ARTIFACT_SPEC_BASENAME}.jar
 echo "...download of ${_ARTIFACT_SPEC_BASENAME}.jar finished." >&2
 echo ${_ARTIFACT_SPEC_BASENAME}.jar