msm requires couchbase jars even when not using couchbase

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What steps will reproduce the problem?
1. Install (or upgrade) msm from 1.6.3 to 1.6.5
NOT using spymemcached but rather using ElastiCache jar
2. Start Tomcat

What is the expected output? What do you see instead?
Expect: Tomcat and msm run.
Got: tomcat fails to start due to missing classs

SEVERE: Begin event threw error
java.lang.NoClassDefFoundError: com/couchbase/client/CouchbaseClient
        at de.javakaffee.web.msm.MemcachedBackupSessionManager.<init>(MemcachedBackupSessionManager.java:80)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
        at java.lang.reflect.Constructor.newInstance(Unknown Source)
        at java.lang.Class.newInstance0(Unknown Source)

What version of the product are you using? On what operating system?

Amazon Linux 
msm 1.6.5

Please provide any additional information below.

Original issue reported on code.google.com by dlee.cal...@gmail.com on 3 Sep 2013 at 2:05

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Original comment by martin.grotzke on 4 Sep 2013 at 8:16

• Changed state: Accepted
• Added labels: Type-Enhancement
• Removed labels: Type-Defect

[GoogleCodeExporter]

Fixed, will be included in the next release.

Original comment by martin.grotzke on 26 Nov 2013 at 8:52

• Changed state: Fixed
• Added labels: Milestone-1.7.0