Dropping 2.12 support

Author: tomasbjerre

.travis.yml

@@ -13,11 +13,8 @@ before_install:
   - export PATH=opt/atlassian-plugin-sdk/bin:opt/atlassian-plugin-sdk/apache-maven-*/bin:$PATH
   - atlas-version
 install:
-  #Install Atlassian libs in local Maven repo
-  - atlas-mvn -q install -Dstash.version=2.12.0 -Dstash.data.version=2.12.0
   - atlas-mvn -q install
 script:
-  - atlas-package -q -Dstash.version=2.12.0 -Dstash.data.version=2.12.0
   - atlas-package -q
 notifications:
   email: false