Added couple of unit-tests to xlObjects (#1950)
Added couple of unit-tests to xlObjects (#1950)

* Added couple of units to xlObjects

* Used test_utils for initialize/destroying xlObjects

aead/minio,harshavardhana/minio,dutchcoders/minio,aead/minio,rushenn/minio,rushenn/minio,abperiasamy/minio,abperiasamy/minio,aead/minio,fwessels/minio,fwessels/minio,krishnasrinivas/minio,hackintoshrao/minio,abperiasamy/minio,krishnasrinivas/minio-daily,dutchcoders/minio,aead/minio,brendanashworth/minio,hackintoshrao/minio,krishnasrinivas/minio,luomeiqin/minio,dvstate/minio,NitishT/minio,balamurugana/minio,krisis/minio,dvstate/minio,aead/minio,brendanashworth/minio,minio/minio,harshavardhana/minio,dvstate/minio,mf-00/newgo,fwessels/minio,luomeiqin/minio,dutchcoders/minio,NitishT/minio,abperiasamy/minio,dutchcoders/minio,jimjag/minio,donatello/minio,harshavardhana/minio,aead/minio,brendanashworth/minio,harshavardhana/minio,rushenn/minio,mf-00/newgo,krishnasrinivas/minio-daily,jimjag/minio,fwessels/minio,alexellis/minio,donatello/minio,krishnasrinivas/minio,balamurugana/minio,rushenn/minio,aead/minio,hackintoshrao/minio,alexellis/minio,harshavardhana/minio,koolhead17/minio,luomeiqin/minio,brendanashworth/minio,NitishT/minio,vadmeste/minio,NitishT/minio,hackintoshrao/minio,jimjag/minio,krisis/minio,luomeiqin/minio,minio/minio,aead/minio,harshavardhana/minio,harshavardhana/minio,krishnasrinivas/minio,vadmeste/minio,koolhead17/minio,jimjag/minio,dvstate/minio,harshavardhana/minio