Fix auth error regressions

Author: wezhang

Utils/azuretools-core/src/com/microsoft/azuretools/authmanage/AdAuthManager.java

@@ -176,8 +176,6 @@ public AuthResult signIn(@Nullable AuthResult savedAuth) throws IOException {
                     // Swallow the exception since some provided environments are not full featured
                     LOGGER.warning("Can't get " + env.resourceManagerEndpoint() + " access token from environment " +
                             CommonSettings.getEnvironment().getName());
-                } else {
-                    throw e;
                 }
             }
 
@@ -188,8 +186,6 @@ public AuthResult signIn(@Nullable AuthResult savedAuth) throws IOException {
                     // Swallow the exception since some provided environments are not full featured
                     LOGGER.warning("Can't get " + env.graphEndpoint() + " access token from environment " +
                             CommonSettings.getEnvironment().getName());
-                } else {
-                    throw e;
                 }
             }
 

Utils/azuretools-core/src/com/microsoft/azuretools/sdkmanage/AccessTokenAzureManager.java

@@ -39,8 +39,10 @@
 import com.microsoft.azuretools.utils.AzureRegisterProviderNamespaces;
 import com.microsoft.azuretools.utils.Pair;
 import com.microsoft.rest.credentials.ServiceClientCredentials;
+import rx.Observable;
 
 import java.io.IOException;
+import java.util.Collections;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.logging.Logger;
@@ -113,12 +115,30 @@ public Settings getSettings() {
     }
 
     public static List<Subscription> getSubscriptions(String tid) throws IOException {
-        List<Subscription> sl = authTid(tid).subscriptions().list();
+        List<Subscription> sl = authTid(tid).subscriptions().listAsync()
+                .onErrorResumeNext(err -> {
+                    LOGGER.warning(err.getMessage());
+
+                    return Observable.empty();
+                })
+                .toList()
+                .toBlocking()
+                .singleOrDefault(Collections.emptyList());
+
         return sl;
     }
 
     public static List<Tenant> getTenants(String tid) throws IOException {
-        List<Tenant> tl = authTid(tid).tenants().list();
+        List<Tenant> tl = authTid(tid).tenants().listAsync()
+                .onErrorResumeNext(err -> {
+                    LOGGER.warning(err.getMessage());
+
+                    return Observable.empty();
+                })
+                .toList()
+                .toBlocking()
+                .singleOrDefault(Collections.emptyList());
+
         return tl;
     }