[maven-release-plugin] prepare for next development iteration

Change-Id: Ib62001948e89ad2f26e0d609d1e756369048efba
diff --git a/extra-analysis-slovak/pom.xml b/extra-analysis-slovak/pom.xml
index 74382e2..0ceb086 100644
--- a/extra-analysis-slovak/pom.xml
+++ b/extra-analysis-slovak/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.wikimedia.search</groupId>
         <artifactId>extra-parent</artifactId>
-        <version>5.6.14</version>
+        <version>5.6.15-SNAPSHOT</version>
     </parent>
 
     <artifactId>extra-analysis-slovak</artifactId>
diff --git a/extra-analysis-surrogates/pom.xml b/extra-analysis-surrogates/pom.xml
index 001fd38..5b9df95 100644
--- a/extra-analysis-surrogates/pom.xml
+++ b/extra-analysis-surrogates/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.wikimedia.search</groupId>
         <artifactId>extra-parent</artifactId>
-        <version>5.6.14</version>
+        <version>5.6.15-SNAPSHOT</version>
     </parent>
 
     <artifactId>extra-analysis-surrogates</artifactId>
diff --git a/extra-common/pom.xml b/extra-common/pom.xml
index 7cb177b..0496f8d 100644
--- a/extra-common/pom.xml
+++ b/extra-common/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.wikimedia.search</groupId>
         <artifactId>extra-parent</artifactId>
-        <version>5.6.14</version>
+        <version>5.6.15-SNAPSHOT</version>
     </parent>
 
     <artifactId>extra-common</artifactId>
diff --git a/extra/pom.xml b/extra/pom.xml
index a5552e0..44ee55d 100644
--- a/extra/pom.xml
+++ b/extra/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.wikimedia.search</groupId>
         <artifactId>extra-parent</artifactId>
-        <version>5.6.14</version>
+        <version>5.6.15-SNAPSHOT</version>
     </parent>
 
     <artifactId>extra</artifactId>
diff --git a/pom.xml b/pom.xml
index 2eea412..45f60a2 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
 
     <groupId>org.wikimedia.search</groupId>
     <artifactId>extra-parent</artifactId>
-    <version>5.6.14</version>
+    <version>5.6.15-SNAPSHOT</version>
     <packaging>pom</packaging>
     <description>Extra queries and filters for Elasticsearch.</description>
 
@@ -43,7 +43,7 @@
     <scm>
         <connection>scm:git:https://gerrit.wikimedia.org/r/search/extra</connection>
         <developerConnection>scm:git:ssh://gerrit.wikimedia.org:29418/search/extra</developerConnection>
-        <tag>extra-parent-5.6.14</tag>
+        <tag>HEAD</tag>
         <url>https://gerrit.wikimedia.org/r/#/admin/projects/search/extra</url>
     </scm>
 
@@ -229,15 +229,15 @@
                     <configuration>
                         <skipTests>${skip.unit.tests}</skipTests>
                         <listeners>
-                            <report-text showNumFailures="30" showOutput="onerror" showStackTraces="true" showStatusError="true" showStatusFailure="true" showStatusIgnored="true" showStatusOk="false" showSuiteSummary="true" showThrowable="true" timestamps="false"></report-text>
-                            <report-ant-xml dir="${project.build.directory}/surefire-reports" mavenExtensions="true"></report-ant-xml>
+                            <report-text showNumFailures="30" showOutput="onerror" showStackTraces="true" showStatusError="true" showStatusFailure="true" showStatusIgnored="true" showStatusOk="false" showSuiteSummary="true" showThrowable="true" timestamps="false" />
+                            <report-ant-xml dir="${project.build.directory}/surefire-reports" mavenExtensions="true" />
                         </listeners>
                         <heartbeat>20</heartbeat>
                         <jvmOutputAction>warn</jvmOutputAction>
                         <leaveTemporary>true</leaveTemporary>
                         <sysouts>false</sysouts>
                         <assertions>
-                            <enable></enable>
+                            <enable />
                         </assertions>
                         <jvmArgs>
                             <param>-Xmx512m</param>
@@ -334,7 +334,7 @@
                                         </goals>
                                     </pluginExecutionFilter>
                                     <action>
-                                        <ignore></ignore>
+                                        <ignore />
                                     </action>
                                 </pluginExecution>
                                 <pluginExecution>
@@ -348,7 +348,7 @@
                                         </goals>
                                     </pluginExecutionFilter>
                                     <action>
-                                        <ignore></ignore>
+                                        <ignore />
                                     </action>
                                 </pluginExecution>
                             </pluginExecutions>