ATS-421 : Create Travis build for "alfresco-transform-core" (#21)

* ATS-421 : ATS-400: Create Travis build for "alfresco-transform-core"
   - rename mvn profile from 'enterpriseDocker' to 'local'
   - add config to publish docker image on both Quay and Docker
   - remove unused 'master' profile - similar to ATS, publish images only from master branch and on Release
   - update <distributionManagement> to publish artefacts to Nexus public (rather than Enterprise Releases)
   - add travis build configs
   - include SP branches to travis build
  - add documentation on build&release process

_ci/whitesource.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+echo "=========================== Starting WhiteSource Script ==========================="
+PS4="\[\e[35m\]+ \[\e[m\]"
+set -vex
+pushd "$(dirname "${BASH_SOURCE[0]}")/../"
+
+
+mvn clean install \
+    -DskipTests org.whitesource:whitesource-maven-plugin:update \
+    -Dorg.whitesource.failOnError=true \
+    -Dorg.whitesource.forceUpdate=true \
+    -Dorg.whitesource.checkPolicies=true \
+    -Dorg.whitesource.forceCheckAllDependencies=true \
+    -Dorg.whitesource.ignorePomModules=false \
+    "-Dorg.whitesource.product=Transform Service" \
+    -Dmaven.wagon.http.pool=false
+
+popd
+set +vex
+echo "=========================== Finishing WhiteSource Script =========================="
+