update object-client version to 3.4.2

[gaddas3]

Wiping a bucket from ecs-service-broker is failing with error "The specified bucket does not exist", even though bucket is present.
org.springframework.cloud.servicebroker.exception.ServiceBrokerException: The specified bucket does not exist.
at com.emc.ecs.servicebroker.service.EcsService.wipeAndDeleteBucket(EcsService.java:147) ~[classes!/:na]
at com.emc.ecs.servicebroker.service.BucketInstanceWorkflow.delete(BucketInstanceWorkflow.java:66) ~[classes!/:na]

The ECS Service Broker is using ECS Client 3.4.2

https://github.com/thecodeteam/ecs-cf-service-broker/blob/master/build.gradle#L49-L52

    implementation(group: 'com.emc.ecs', name: 'object-client', version: '3.4.2') {
        exclude module: "slf4j-log4j12"
        exclude module: "jsr311-api"
    }

But the Bucket wipe is using an older client 3.1.3
https://github.com/EMCECS/bucket-wipe/blob/master/build.gradle#L39-L42

dependencies {
    implementation('com.emc.ecs:object-client:3.1.3') {
        exclude group: 'org.slf4j', module: 'slf4j-log4j12'
    }