Update start_broker.sh

Attempting to match vars and defaults from https://github.com/awslabs/aws-servicebroker/blob/master/packaging/cloudfoundry/tile.yml.

scripts/start_broker.sh

@@ -3,15 +3,20 @@
 # Script to start the broker run by Dockerfile
 #
 aws-servicebroker \
-    -insecure \
-    -alsologtostderr \
-    -region ${AWS_DEFAULT_REGION:=us-west-2} \
-    -s3Bucket ${S3_BUCKET:=awsservicebrokeralpha} \
-    -s3Key ${BUCKET_PREFIX:=pcf/templates} \
-    -s3Region ${BUCKET_REGION:=us-west-2} \
-    -port ${PORT:=3199} \
-    -tableName ${DYNAMO_TABLE:=awssb} \
-    -enableBasicAuth \
-    -basicAuthUser ${SECURITY_USER_NAME:=admin} \
-    -basicAuthPass ${SECURITY_USER_PASSWORD} \
-    -v=${VERBOSE_LEVEL:=4}
+    -logtostderr \
+    -brokerId=${BROKER_ID:=awsservicebroker} \
+    -enableBasicAuth=true \
+    -basicAuthUser=${SECURITY_USER_NAME:=admin} \
+    -basicAuthPass=${SECURITY_USER_PASSWORD} \
+    -insecure=${INSECURE:=false} \
+    -port=${PORT:=3199} \
+    -region=${TABLE_REGION:=us-east-1} \
+    -s3Bucket=${S3_BUCKET:=awsservicebroker} \
+    -s3Key=${S3_KEY:=templates/latest/} \
+    -s3Region=${S3_REGION:=us-east-1} \
+    -tableName=${TABLE_NAME:=aws-service-broker} \
+    -templateFilter=${TEMPLATE_FILTER:=-main.yaml} \
+    -tlsCert=${TLS_CERT} \
+    -tlsKey=${TLS_KEY} \
+    -prescribeOverrides=${PRESCRIBE:=true} \
+    -v=${VERBOSITY:=5}