Revert "[maven-release-plugin] prepare release 0.7.1"

This reverts commit eff8e26.

Author: nwbirnie

google-ads-examples/pom.xml

@@ -16,20 +16,22 @@
  * specific language governing permissions and limitations
  * under the License.
 -->
-<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/maven-v4_0_0.xsd">
+<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/maven-v4_0_0.xsd">
 
   <parent>
     <groupId>com.google.api-ads</groupId>
     <artifactId>google-ads-parent</artifactId>
-    <version>0.7.1</version>
+    <version>0.7.1-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api-ads</groupId>
   <artifactId>google-ads-examples</artifactId>
   <packaging>jar</packaging>
-  <version>0.7.1</version>
+  <version>0.7.1-SNAPSHOT</version>
   <name>Google Ads API client library for Java examples</name>
   <description>
     Examples demonstrating the Google Ads API client library for Java.
@@ -62,7 +64,7 @@
     <dependency>
       <groupId>com.google.api-ads</groupId>
       <artifactId>google-ads</artifactId>
-      <version>0.7.1</version>
+      <version>0.7.1-SNAPSHOT</version>
     </dependency>
     <dependency>
       <groupId>com.beust</groupId>

google-ads/pom.xml

@@ -21,15 +21,15 @@
   <parent>
     <groupId>com.google.api-ads</groupId>
     <artifactId>google-ads-parent</artifactId>
-    <version>0.7.1</version>
+    <version>0.7.1-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.google.api-ads</groupId>
   <artifactId>google-ads</artifactId>
   <packaging>jar</packaging>
-  <version>0.7.1</version>
+  <version>0.7.1-SNAPSHOT</version>
   <name>Google Ads API client library for Java</name>
   <description>
     Google Ads API client library for Java.

pom.xml

@@ -22,7 +22,7 @@
 
   <groupId>com.google.api-ads</groupId>
   <artifactId>google-ads-parent</artifactId>
-  <version>0.7.1</version>
+  <version>0.7.1-SNAPSHOT</version>
 
   <packaging>pom</packaging>
   <name>Google Ads API client library for Java project</name>
@@ -56,7 +56,7 @@
     <url>
       https://github.com/googleads/google-ads-java
     </url>
-    <tag>0.7.1</tag>
+    <tag>HEAD</tag>
   </scm>
 
   <developers>