SEARCH-2318: Add Travis configuration to Insight Engine (#873)

The changes include the following:
* The python scripts for e2e environment creation were moved to this code base
* Mirror to community
* Docker image check
* Unit, integration and e2e tests
* "Snapshots": "latest" docker image from master in quay.io, docker images for "release" branches to quay.io, "master" and * "release" branches snapshots to nexus
* Releases: nexus, s3 staging bucket, quay.io and dockerhub
* Fix for https://issues.alfresco.com/jira/browse/SEARCH-2389

The build is using branches only.

e2e-test/python-generator/templates/alfresco/Dockerfile.template

@@ -0,0 +1,49 @@
+FROM ${ALFRESCO_IMAGE}
+
+ENV TOMCAT_DIR=/usr/local/tomcat
+ENV ALF_DATA_DIR=$${TOMCAT_DIR}/alf_data
+
+# COMMS
+ARG SOLR_COMMS
+ENV SOLR_COMMS $$SOLR_COMMS
+
+# SSL
+ARG TRUSTSTORE_TYPE
+ARG TRUSTSTORE_PASS
+ARG KEYSTORE_TYPE
+ARG KEYSTORE_PASS
+
+ENV TRUSTSTORE_TYPE=$$TRUSTSTORE_TYPE \
+    TRUSTSTORE_PASS=$$TRUSTSTORE_PASS \
+    KEYSTORE_TYPE=$$KEYSTORE_TYPE \
+    KEYSTORE_PASS=$$KEYSTORE_PASS
+
+USER root
+
+# Default value in 'repository.properties' is 'dir.keystore=classpath:alfresco/keystore'
+RUN if [ "$$SOLR_COMMS" == "https" ] ; then \
+        echo -e "\n\
+        dir.keystore=$${ALF_DATA_DIR}/keystore\n\
+        alfresco.encryption.ssl.keystore.type=$${TRUSTSTORE_TYPE}\n\
+        alfresco.encryption.ssl.truststore.type=$${KEYSTORE_TYPE}\n\
+        " >> $${TOMCAT_DIR}/shared/classes/alfresco-global.properties; \
+    fi
+
+# Enable SSL by adding the proper Connector to server.xml
+RUN if [ "$$SOLR_COMMS" == "https" ] ; then \
+      sed -i "s/\
+[[:space:]]\+<\/Engine>/\n\
+        <\/Engine>\n\
+        <Connector port=\"8443\" protocol=\"org.apache.coyote.http11.Http11Protocol\"\n\
+            connectionTimeout=\"20000\"\n\
+            SSLEnabled=\"true\" maxThreads=\"150\" scheme=\"https\"\n\
+            keystoreFile=\"\/usr\/local\/tomcat\/alf_data\/keystore\/ssl.keystore\"\n\
+            keystorePass=\"$${KEYSTORE_PASS}\" keystoreType=\"$${KEYSTORE_TYPE}\" secure=\"true\"\n\
+            truststoreFile=\"\/usr\/local\/tomcat\/alf_data\/keystore\/ssl.truststore\"\n\
+            truststorePass=\"$${TRUSTSTORE_PASS}\" truststoreType=\"$${TRUSTSTORE_TYPE}\" clientAuth=\"want\" sslProtocol=\"TLS\">\n\
+        <\/Connector>/g" $${TOMCAT_DIR}/conf/server.xml; \
+    fi
+
+# Expose keystore folder
+# Useless for 'none'/'http' communications with SOLR
+VOLUME ["$$ALF_DATA_DIR/keystore"]