CAIQUM-7966: AIQUM fails to complete discovery of a cluster if background compression is not enabled
Issue
AIQUM is unable to successfully complete a poll for clusters where background compression is not enabled for some volumes.
ERROR [common-pool-680] c.o.s.a.f.d.BaseDataSource (BaseDataSource.java:336) - [netappfoundation] zce1op02ontapcl1 - Runtime exception: Cannot invoke "com.onaro.sanscreen.acquisition.datasource.netapp_ocie.model.EnumWrapper.getEnumValue()" because the return value of "com.onaro.sanscreen.acquisition.datasource.netapp_ocie.model.cmode.CModeSisStatus.getState()" is null java.lang.NullPointerException: Cannot invoke "com.onaro.sanscreen.acquisition.datasource.netapp_ocie.model.EnumWrapper.getEnumValue()" because the return value of "com.onaro.sanscreen.acquisition.datasource.netapp_ocie.model.cmode.CModeSisStatus.getState()" is null
