Fix the testsuite build error resulting from changing snowdrop artifact to jboss-spring-deployer

Testsuite build fails with:

tests-springdeployer:
[echo] creating springdeployer config, jboss.dist=/mnt/hudson_workspace/workspace/JBoss-AS-6.0.x-testSuite-sun16/JBossAS/build/target/jboss-6.0.0-SNAPSHOT
[copy] Copying 214 files to /mnt/hudson_workspace/workspace/JBoss-AS-6.0.x-testSuite-sun16/JBossAS/build/target/jboss-6.0.0-SNAPSHOT/server/springdeployer
[copy] Copied 78 empty directories to 1 empty directory under /mnt/hudson_workspace/workspace/JBoss-AS-6.0.x-testSuite-sun16/JBossAS/build/target/jboss-6.0.0-SNAPSHOT/server/springdeployer

BUILD FAILED
/mnt/hudson_workspace/workspace/JBoss-AS-6.0.x-testSuite-sun16/JBossAS/testsuite/build.xml:1259: The following error occurred while executing this line:
/mnt/hudson_workspace/workspace/JBoss-AS-6.0.x-testSuite-sun16/JBossAS/testsuite/build.xml:1386: The following error occurred while executing this line:
/mnt/hudson_workspace/workspace/JBoss-AS-6.0.x-testSuite-sun16/JBossAS/testsuite/imports/server-config.xml:1032: Reference org.jboss.snowdrop:snowdrop:zip not found.