Use tar archive, since travis supports only one encrypted file

.travis.yml

@@ -2,16 +2,17 @@ sudo: false
 language: java
 jdk: oraclejdk8
 before_install:
+  - openssl aes-256-cbc -K $encrypted_5630fbebf057_key -iv $encrypted_5630fbebf057_iv -in .travis/secrets.tar.enc -out .travis/secrets.tar -d
+  - cd .travis && tar xfv secrets.tar
   - echo "MAVEN_OPTS='-Xms1g -Xmx1g'" > "$HOME/.mavenrc"
   - mkdir -p "$HOME/.m2"
   - cp .travis/travis-toolchains.xml "$HOME/.m2/toolchains.xml"
   - cp .travis/travis-settings.xml "$HOME/.m2/settings.xml"
   - mkdir -p "$HOME/.ssh"
   - chmod 700 "$HOME/.ssh"
-  - openssl aes-256-cbc -K $encrypted_5630fbebf057_key -iv $encrypted_5630fbebf057_iv -in .travis/id_rsa.enc -out "$HOME/.ssh/id_rsa" -d
+  - mv .travis/id_rsa "$HOME/.ssh/id_rsa"
   - chmod 600 "$HOME/.ssh/id_rsa"
   - mkdir -p "$HOME/.gpg"
-  - openssl aes-256-cbc -K $encrypted_5630fbebf057_key -iv $encrypted_5630fbebf057_iv -in .travis/release-signing-key-82DE7BE82166E84E.gpg.enc -out .travis/release-signing-key-82DE7BE82166E84E.gpg -d
   - gpg2 --batch --import .travis/release-signing-key-82DE7BE82166E84E.gpg
 install: mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V
 script: