Maven Exposing properties files appassembler - spring

Question

To load environment specific values, in my src/main/resources folder, I have some properties files in different subfolders i.e.
com/app/ws/webservices-dev.properties
com/app/ws/webservices-test.properties
com/app/jms/jms-dev.properties
com/app/jms/jms-test.properties
I am loading these properties through spring
<bean id="placeholderProperties" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:/com/app/jms/jms-${ENVIRONMENT:dev}.properties</value>
<value>classpath:/com/app/ws/webservices-${ENVIRONMENT:dev}.properties</value>
</list>
</property>
<property name="systemPropertiesModeName" value="SYSTEM_PROPERTIES_MODE_OVERRIDE" />
<property name="ignoreResourceNotFound" value="true" />
<property name="ignoreUnresolvablePlaceholders" value="true" />
<property name="order" value="0" />
</bean>
ENVIRONMENT is environment variable.
I am using appassembler-maven-plugin to generate the executable .sh file.
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>appassembler-maven-plugin</artifactId>
<version>1.2.2</version>
<configuration>
<binFileExtensions>
<unix>.sh</unix>
</binFileExtensions>
<programs>
<program>
<mainClass>com.app.MainApp</mainClass>
<name>MainApp</name>
</program>
</programs>
</configuration>
</plugin>
As a result of this all my properties files become part of my generated jar file. I want to expose some of the properties to set their values at deployment time. I have tried following configuration
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>appassembler-maven-plugin</artifactId>
<version>1.2.2</version>
<configuration>
<configurationSourceDirectory>src/main/resources/com/app/bootstrap</configurationSourceDirectory>
<configurationDirectory>conf</configurationDirectory>
<copyConfigurationDirectory>true</copyConfigurationDirectory>
<includeConfigurationDirectoryInClasspath>true</includeConfigurationDirectoryInClasspath>
<binFileExtensions>
<unix>.sh</unix>
</binFileExtensions>
<programs>
<program>
<mainClass>com.app.MainApp</mainClass>
<name>MainApp</name>
</program>
</programs>
</configuration>
</plugin>
But Spring does not load the properties; maybe due to the given path in spring config (see above).
What maven configuration should I use to move my properties files in appassembler\conf folder during package time and have spring load them from the classpath. I am after the configuration that works for both development(in eclipse, unit tests as maven builds) and in deployment.