OAK-11596 : removed Guava's Iterables imports (#2174)

* OAK-11596 : removed Guava's Iterables imports

* OAK-11596 : added review comments

---------

Co-authored-by: Rishabh Kumar <diam@adobe.com>

Author: rishabhdaim

oak-auth-external/src/main/java/org/apache/jackrabbit/oak/spi/security/authentication/external/impl/DynamicSyncContext.java

@@ -16,7 +16,6 @@
  */
 package org.apache.jackrabbit.oak.spi.security.authentication.external.impl;
 
-import org.apache.jackrabbit.guava.common.collect.Iterables;
 import org.apache.jackrabbit.api.security.user.Authorizable;
 import org.apache.jackrabbit.api.security.user.Group;
 import org.apache.jackrabbit.api.security.user.UserManager;

oak-auth-external/src/main/java/org/apache/jackrabbit/oak/spi/security/authentication/external/impl/ExternalLoginModule.java

@@ -17,7 +17,6 @@
 package org.apache.jackrabbit.oak.spi.security.authentication.external.impl;
 
 import org.apache.jackrabbit.guava.common.base.Stopwatch;
-import org.apache.jackrabbit.guava.common.collect.Iterables;
 import org.apache.jackrabbit.api.security.user.UserManager;
 import org.apache.jackrabbit.oak.api.AuthInfo;
 import org.apache.jackrabbit.oak.api.CommitFailedException;

oak-auth-external/src/main/java/org/apache/jackrabbit/oak/spi/security/authentication/external/impl/principal/DynamicGroupValidatorProvider.java

@@ -16,7 +16,6 @@
  */
 package org.apache.jackrabbit.oak.spi.security.authentication.external.impl.principal;
 
-import org.apache.jackrabbit.guava.common.collect.Iterables;
 import org.apache.jackrabbit.oak.api.CommitFailedException;
 import org.apache.jackrabbit.oak.api.PropertyState;
 import org.apache.jackrabbit.oak.api.Root;

oak-auth-external/src/main/java/org/apache/jackrabbit/oak/spi/security/authentication/external/impl/principal/ExternalGroupPrincipalProvider.java

@@ -47,7 +47,6 @@
 import org.apache.jackrabbit.api.security.user.UserManager;
 import org.apache.jackrabbit.commons.iterator.AbstractLazyIterator;
 import org.apache.jackrabbit.guava.common.collect.ImmutableSet;
-import org.apache.jackrabbit.guava.common.collect.Iterables;
 import org.apache.jackrabbit.guava.common.collect.Iterators;
 import org.apache.jackrabbit.oak.api.PropertyState;
 import org.apache.jackrabbit.oak.api.PropertyValue;

oak-auth-external/src/main/java/org/apache/jackrabbit/oak/spi/security/authentication/external/impl/principal/ExternalUserValidatorProvider.java

@@ -16,7 +16,6 @@
  */
 package org.apache.jackrabbit.oak.spi.security.authentication.external.impl.principal;
 
-import org.apache.jackrabbit.guava.common.collect.Iterables;
 import org.apache.jackrabbit.oak.api.CommitFailedException;
 import org.apache.jackrabbit.oak.api.PropertyState;
 import org.apache.jackrabbit.oak.api.Root;

oak-auth-external/src/main/java/org/apache/jackrabbit/oak/spi/security/authentication/external/impl/principal/SyncHandlerMappingTracker.java

@@ -16,7 +16,6 @@
  */
 package org.apache.jackrabbit.oak.spi.security.authentication.external.impl.principal;
 
-import org.apache.jackrabbit.guava.common.collect.Iterables;
 import org.apache.jackrabbit.oak.commons.PropertiesUtil;
 import org.apache.jackrabbit.oak.commons.collections.IterableUtils;
 import org.apache.jackrabbit.oak.spi.security.authentication.external.SyncHandler;

oak-auth-external/src/test/java/org/apache/jackrabbit/oak/spi/security/authentication/external/basic/DefaultSyncContextTest.java

@@ -16,7 +16,6 @@
  */
 package org.apache.jackrabbit.oak.spi.security.authentication.external.basic;
 
-import org.apache.jackrabbit.guava.common.collect.Iterables;
 import org.apache.jackrabbit.api.security.user.Authorizable;
 import org.apache.jackrabbit.api.security.user.Group;
 import org.apache.jackrabbit.api.security.user.User;

oak-auth-external/src/test/java/org/apache/jackrabbit/oak/spi/security/authentication/external/impl/AbstractDynamicTest.java

@@ -16,7 +16,6 @@
  */
 package org.apache.jackrabbit.oak.spi.security.authentication.external.impl;
 
-import org.apache.jackrabbit.guava.common.collect.Iterables;
 import org.apache.jackrabbit.api.security.user.Authorizable;
 import org.apache.jackrabbit.api.security.user.UserManager;
 import org.apache.jackrabbit.oak.api.Root;

oak-auth-external/src/test/java/org/apache/jackrabbit/oak/spi/security/authentication/external/impl/DynamicSyncContextTest.java

@@ -16,7 +16,6 @@
  */
 package org.apache.jackrabbit.oak.spi.security.authentication.external.impl;
 
-import org.apache.jackrabbit.guava.common.collect.Iterables;
 import org.apache.jackrabbit.guava.common.collect.Iterators;
 import org.apache.jackrabbit.api.security.user.Authorizable;
 import org.apache.jackrabbit.api.security.user.Group;

oak-auth-external/src/test/java/org/apache/jackrabbit/oak/spi/security/authentication/external/impl/PrincipalResolutionTest.java

@@ -16,7 +16,6 @@
  */
 package org.apache.jackrabbit.oak.spi.security.authentication.external.impl;
 
-import org.apache.jackrabbit.guava.common.collect.Iterables;
 import org.apache.jackrabbit.api.security.user.Authorizable;
 import org.apache.jackrabbit.api.security.user.Group;
 import org.apache.jackrabbit.oak.api.PropertyState;