Adding aws implementation

.gitignore

pom.xml

provider/indexer-aws/CloudFormation/Automated/cache.yml

...ider/indexer-aws/CloudFormation/Automated/ecs-cluster.yml

...ider/indexer-aws/CloudFormation/Automated/ecs-network.yml

...er/indexer-aws/CloudFormation/Automated/elasticsearch.yml

.../indexer-aws/CloudFormation/Automated/iam-credentials.yml

provider/indexer-aws/CloudFormation/Automated/sns-topic.yml

...dexer-aws/CloudFormation/Manual/01-CreateCodePipeline.yml

...r/indexer-aws/CloudFormation/Master/os-indexer-master.yml

...aws/CloudFormation/Params/dev.template_configuration.json

...ws/CloudFormation/Params/prod.template_configuration.json

...aws/CloudFormation/Params/uat.template_configuration.json

provider/indexer-aws/Dockerfile

provider/indexer-aws/buildspec-post-deploy.yml

provider/indexer-aws/buildspec-pre-deploy.yml

provider/indexer-aws/maven/settings.xml

provider/indexer-aws/pom.xml

...p/osdu/indexer/aws/cache/ElasticCredentialsCacheImpl.java

.../org/opengroup/osdu/indexer/aws/cache/IndexCacheImpl.java