ASTERIXDB-1120: Fix sub-project builds.

The maven-assembly-plugin configuration for creating source tarballs was
interfering with building in a subdirectory. Since we only need tarballs
at release time, move this plugin to a new 'asterix-release' profile.

Change-Id: I457c1700459741158a245f20a9ab2adfc79731d2
Reviewed-on: https://asterix-gerrit.ics.uci.edu/431
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
Reviewed-by: Ian Maxon <imaxon@apache.org>
Tested-by: Chris Hillery <ceej@lambda.nu>
diff --git a/pom.xml b/pom.xml
index 8d11476..06fd841 100644
--- a/pom.xml
+++ b/pom.xml
@@ -146,31 +146,6 @@
                     </includes>
                 </configuration>
             </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-assembly-plugin</artifactId>
-                 <!-- We override the configuration plugin to override the descriptor to use for building
-                  the source release zip. Specifically, we would like to control the inclusions/exclusions.
-                  For example, we exclude the KEYS file from the zip -->
-                <executions>
-                    <execution>
-                    <!-- Use this id to match the id mentioned in the assembly plugin configuration in
-                     the apache parent POM under the apache-release profile -->
-                        <id>source-release-assembly</id>
-                        <phase>package</phase>
-                        <goals>
-                            <goal>single</goal>
-                        </goals>
-            <!-- combine.self should be override to replace the configuration in the parent POM -->
-                        <configuration combine.self="override">
-                            <runOnlyAtExecutionRoot>true</runOnlyAtExecutionRoot>
-                            <descriptors>
-                                <descriptor>src/main/assembly/source.xml</descriptor>
-                            </descriptors>
-                        </configuration>
-                  </execution>
-              </executions>
-            </plugin>
         </plugins>
     </build>
 
@@ -237,7 +212,38 @@
                 <test.heap.size>3072</test.heap.size>
             </properties>
         </profile>
-
+        <profile>
+          <id>asterix-release</id>
+          <build>
+            <plugins>
+              <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <!-- We override the configuration plugin to override the descriptor to use for building
+                the source release zip. Specifically, we would like to control the inclusions/exclusions.
+                For example, we exclude the KEYS file from the zip -->
+                <executions>
+                  <execution>
+                    <!-- Use this id to match the id mentioned in the assembly plugin configuration in
+                    the apache parent POM under the apache-release profile -->
+                    <id>source-release-assembly</id>
+                    <phase>package</phase>
+                    <goals>
+                      <goal>single</goal>
+                    </goals>
+                    <!-- combine.self should be override to replace the configuration in the parent POM -->
+                    <configuration combine.self="override">
+                      <runOnlyAtExecutionRoot>true</runOnlyAtExecutionRoot>
+                      <descriptors>
+                        <descriptor>src/main/assembly/source.xml</descriptor>
+                      </descriptors>
+                    </configuration>
+                  </execution>
+                </executions>
+              </plugin>
+            </plugins>
+          </build>
+        </profile>
     </profiles>
 
     <modules>