Kafka Transactional Sample

- Added transactional and some more required properties
 - Setting read_commited in consumer
 - Added license and author tag
 - Added more fleshed out readme
 - Added alternate failure and removed unique index
 - Update spring boot starter parent to 2.1.0.BUILD-SNAPSHOT

transaction-kafka-samples/transaction-http-source/pom.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <artifactId>transaction-http-source</artifactId>
+  <version>0.0.1-SNAPSHOT</version>
+  <packaging>jar</packaging>
+  <name>transaction-http-source</name>
+  <description>Transaction http source</description>
+
+  <parent>
+    <groupId>spring.cloud.stream.samples</groupId>
+    <artifactId>spring-cloud-stream-samples-parent</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <relativePath>../..</relativePath>
+  </parent>
+
+
+  <dependencies>
+    <dependency>
+      <groupId>org.springframework.cloud</groupId>
+      <artifactId>spring-cloud-stream-schema</artifactId>
+    </dependency>
+    <dependency>
+      <groupId>org.springframework.cloud</groupId>
+      <artifactId>spring-cloud-stream-binder-kafka</artifactId>
+    </dependency>
+
+  </dependencies>
+  <build>
+    <plugins>
+      <plugin>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-maven-plugin</artifactId>
+      </plugin>
+    </plugins>
+  </build>
+</project>