fix(loader): use HTTPS download URLs in travis scripts (#717)

Author: VGalaxies

hugegraph-loader/assembly/travis/install-hadoop.sh

@@ -17,7 +17,7 @@
 #
 set -ev
 
-sudo wget http://archive.apache.org/dist/hadoop/common/hadoop-2.8.5/hadoop-2.8.5.tar.gz
+sudo wget https://archive.apache.org/dist/hadoop/common/hadoop-2.8.5/hadoop-2.8.5.tar.gz
 
 sudo tar -zxf hadoop-2.8.5.tar.gz -C /usr/local
 cd /usr/local

hugegraph-loader/assembly/travis/install-mysql.sh

@@ -32,7 +32,7 @@ docker run -p 3306:3306 --name "$1" -e MYSQL_ROOT_PASSWORD="$2" -d mysql:5.7
 
 
 # Old Version
-#MYSQL_DOWNLOAD_ADDRESS="http://dev.MySQL.com/get/Downloads"
+#MYSQL_DOWNLOAD_ADDRESS="https://dev.mysql.com/get/Downloads"
 #MYSQL_VERSION="MySQL-5.7"
 #MYSQL_PACKAGE="mysql-5.7.11-Linux-glibc2.5-x86_64"
 #MYSQL_TAR="${MYSQL_PACKAGE}.tar.gz"