Handle api exceptions correctly

[StrongestNumber9]

20.07.2023 07:32:41.137 [DEBUG] [com.teragrep.k8s_01.KubernetesCachingAPIClient] [pool-2-thread-1] Cache miss for namespace: default
20.07.2023 07:32:41.137 [DEBUG] [com.teragrep.k8s_01.KubernetesCachingAPIClient] [pool-2-thread-1] Fetching namespace metadata: default
Exception in thread "pool-2-thread-1" com.google.common.util.concurrent.UncheckedExecutionException: io.kubernetes.client.openapi.ApiException: 
        at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:5019)
        at com.teragrep.k8s_01.KubernetesCachingAPIClient.getNamespace(KubernetesCachingAPIClient.java:158)
        at com.teragrep.k8s_01.K8SConsumer.accept(K8SConsumer.java:134)
        at com.teragrep.k8s_01.K8SConsumer.accept(K8SConsumer.java:42)
        at com.teragrep.rlo_13.MonitoredFileConsumer.readFile(MonitoredFileConsumer.java:133)
        at com.teragrep.rlo_13.MonitoredFileConsumer.accept(MonitoredFileConsumer.java:174)
        at com.teragrep.rlo_13.MonitoredFileConsumer.accept(MonitoredFileConsumer.java:33)
        at com.teragrep.rlo_12.FileTask.run(FileTask.java:63)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:750)
Caused by: io.kubernetes.client.openapi.ApiException: 
        at io.kubernetes.client.openapi.ApiClient.handleResponse(ApiClient.java:973)
        at io.kubernetes.client.openapi.ApiClient.execute(ApiClient.java:885)
        at io.kubernetes.client.openapi.apis.CoreV1Api.readNamespaceWithHttpInfo(CoreV1Api.java:49642)
        at io.kubernetes.client.openapi.apis.CoreV1Api.readNamespace(CoreV1Api.java:49619)
        at com.teragrep.k8s_01.KubernetesCachingAPIClient.fetchNamespace(KubernetesCachingAPIClient.java:166)
        at com.teragrep.k8s_01.KubernetesCachingAPIClient.access$200(KubernetesCachingAPIClient.java:38)
        at com.teragrep.k8s_01.KubernetesCachingAPIClient$2.load(KubernetesCachingAPIClient.java:111)
        at com.teragrep.k8s_01.KubernetesCachingAPIClient$2.load(KubernetesCachingAPIClient.java:103)
        at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3570)
        at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2312)
        at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2189)
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2079)
        at com.google.common.cache.LocalCache.get(LocalCache.java:4011)
        at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:4034)
        at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:5010)
        at com.google.common.cache.LocalCache$LocalLoadingCache.getUnchecked(LocalCache.java:5017)
        ... 10 more