To me it sounds like you should go for single ear with multiple web modules. See the official docs: http://maven.apache.org/plugins/maven-ear-plugin/modules.html
As you would still use SOA the web services could communicate between each other via whatever interface defined, just deployment could be simplified dramatically.
Your project pom.xml
s could look like this:
WebModuleA with pom.xml
like:
<groupId>???</groupId>
<artifactId>webModuleA</artifactId>
<version>???</version>
<type>war</type>
<dependencies>
<dependency>
<groupId>???</groupId>
<artifactId>payment-service</artifactId>
<version>1.1.9</version>
<type>jar</type>
</dependency>
...
webModuleB with pom.xml
like:
<groupId>???</groupId>
<artifactId>webModuleB</artifactId>
<version>???</version>
<type>war</type>
<dependencies>
<dependency>
<groupId>???</groupId>
<artifactId>payment-service</artifactId>
<version>1.1.9</version>
<type>jar</type>
</dependency>
...
payment-service with pom.xml
like:
<groupId>???</groupId>
<artifactId>payment-service</artifactId>
<version>1.1.9</version>
<type>jar</type>
...
and finally, the earModule that would contain all the web modules:
<groupId>???</groupId>
<artifactId>earModule</artifactId>
<version>???</version>
<type>ear</type>
<dependencies>
<dependency>
<groupId>???</groupId>
<artifactId>webModuleA</artifactId>
<version>???</version>
<type>war</type>
</dependency>
<dependency>
<groupId>???</groupId>
<artifactId>webModuleB</artifactId>
<version>???</version>
<type>war</type>
</dependency>
...
<plugin>
<artifactId>maven-ear-plugin</artifactId>
<version>2.8</version>
<configuration>
<modules>
<webModule>
<groupId>???</groupId>
<artifactId>webModuleA</artifactId>
</webModule>
<webModule>
<groupId>???</groupId>
<artifactId>webModuleA</artifactId>
</webModule>
...
</modules>
</configuration>
</plugin>
That should be basically it.
Moreover, if you want to prevent having payment-service packaged in the each war
webModuleX (to reduce the size of the final ear archive), make sure to go for so called "skinny wars": http://maven.apache.org/plugins/maven-ear-plugin/examples/skinny-wars.html
Feel free to ask in detail, if some of the suggestions is unclear or inaccurate.