[Bash] Add test setting for Bash client (#6558)

* add pom.xml and travis.yml for bash

* create travis.yml.bak, test .travis.yml.bash

* restore travis.yml

.travis.yml.bash

@@ -0,0 +1,37 @@
+sudo: required
+language: java
+jdk:
+  - openjdk8
+
+cache:
+  directories:
+  - $HOME/.m2
+  - $HOME/.ivy2
+
+services:
+  - docker
+
+addons:
+  hosts:
+    - petstore.swagger.io
+
+before_install:
+  # to run petstore server locally via docker
+  - docker pull swaggerapi/petstore
+  - docker run -d -e SWAGGER_HOST=http://petstore.swagger.io -e SWAGGER_BASE_PATH=/v2 -p 80:8080 swaggerapi/petstore
+  - docker ps -a
+  # Add bats test framework and cURL for Bash script integration tests
+  - sudo add-apt-repository ppa:duggan/bats --yes
+  - sudo apt-get update -qq
+  - sudo apt-get install -qq bats
+  - sudo apt-get install -qq curl
+
+  # show host table to confirm petstore.swagger.io is mapped to localhost
+  - cat /etc/hosts
+
+script:
+  # fail fast
+  - set -e
+  # run integration tests defined in maven pom.xml
+  - cp pom.xml.bash pom.xml
+  - mvn --batch-mode verify -Psamples