Release all modules to Maven Central (#45)

Implement release process to Maven Central using TravisCI

Author: adam-sandor

.travis.yml

@@ -1,2 +1,6 @@
 language: java
-dist: bionic
+dist: bionic
+before_install:
+- echo $GPGKEY | base64 --decode | gpg --import
+script:
+- mvn deploy --settings=maven-settings.xml -Prelease

maven-settings.xml

@@ -0,0 +1,22 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<settings>
+  <servers>
+      <server>
+        <id>ossrh</id>
+        <username>${env.SONATYPE_USERNAME}</username>
+        <password>${env.SONATYPE_PASSWORD}</password>
+      </server>
+  </servers>
+
+  <profiles>
+    <profile>
+      <id>ossrh</id>
+      <activation>
+        <activeByDefault>true</activeByDefault>
+      </activation>
+      <properties>
+        <gpg.executable>gpg</gpg.executable>
+      </properties>
+    </profile>
+  </profiles>
+</settings>

samples/webserver/pom.xml

@@ -3,11 +3,16 @@
          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>
 
-    <groupId>com.github.containersolutions</groupId>
+    <parent>
+        <groupId>com.github.containersolutions</groupId>
+        <artifactId>operator-framework-samples</artifactId>
+        <version>0.3.2-SNAPSHOT</version>
+    </parent>
+
     <artifactId>webserver-sample</artifactId>
-    <version>0.3.2-SNAPSHOT</version>
+    <name>Operator SDK - Samples - Webserver</name>
+    <description>Provisions an nginx Webserver based on a CRD</description>
     <packaging>jar</packaging>
-    <name>Operator SDK - Samples - Web Server</name>
 
     <properties>
         <java.version>11</java.version>
@@ -50,15 +55,6 @@
                 <groupId>com.spotify</groupId>
                 <artifactId>dockerfile-maven-plugin</artifactId>
                 <version>1.4.12</version>
-                <executions>
-                    <execution>
-                        <id>default</id>
-                        <phase>install</phase>
-                        <goals>
-                            <goal>build</goal>
-                        </goals>
-                    </execution>
-                </executions>
                 <configuration>
                     <repository>webserver-operator</repository>
                     <tag>latest</tag>