Add initial CI setup

[adithyaselv]

Fixes #15 depends on #13

In this PR I am adding a basic CI setup using travis which will build and test the API gateway written in Scala.

Definition of done

• Add .travis.yml file with required config
• Add rule to merge only if the build passes

Future work (create issues)

• Create matrix to support multiple languages Use matrix in Travis to run tests for different languages #50
• Add script to check code formatting

[adithyaselv]

@rasmitha-koduru @shubhangis91 Basic CI is working now ! yay. You guys might want to learn about multi-project builds in order to add your own scripts

[rasmitha-koduru]

Is this the negative case u added to test CI?

[adithyaselv]

Nope. This is a working one ! you could see the build report here https://travis-ci.org/airavata-courses/CAPtivate/builds/647150994?utm_source=github_status&utm_medium=notification

[adithyaselv]

The green check mark next to the commit id indicates CI passed for the commit . It failed for the first commit since the api-gateway service wasn't there in the master then

[rasmitha-koduru]

Ok got it, yes i have seen the build report. Thanks