[DLAB-1700] Fixed issue with admin per project
diff --git a/services/self-service/src/main/java/com/epam/dlab/backendapi/dao/UserRoleDao.java b/services/self-service/src/main/java/com/epam/dlab/backendapi/dao/UserRoleDao.java
index c9b5585..48abb54 100644
--- a/services/self-service/src/main/java/com/epam/dlab/backendapi/dao/UserRoleDao.java
+++ b/services/self-service/src/main/java/com/epam/dlab/backendapi/dao/UserRoleDao.java
@@ -47,5 +47,5 @@
 
 	boolean removeGroup(String groupId);
 
-	List<UserGroupDto> aggregateRolesByGroup(boolean isAdmin);
+	List<UserGroupDto> aggregateRolesByGroup();
 }
diff --git a/services/self-service/src/main/java/com/epam/dlab/backendapi/dao/UserRoleDaoImpl.java b/services/self-service/src/main/java/com/epam/dlab/backendapi/dao/UserRoleDaoImpl.java
index 174e71f..81b7135 100644
--- a/services/self-service/src/main/java/com/epam/dlab/backendapi/dao/UserRoleDaoImpl.java
+++ b/services/self-service/src/main/java/com/epam/dlab/backendapi/dao/UserRoleDaoImpl.java
@@ -25,9 +25,7 @@
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.google.inject.Singleton;
-import com.mongodb.client.model.Aggregates;
 import com.mongodb.client.model.BsonField;
-import com.mongodb.client.model.Filters;
 import com.mongodb.client.result.UpdateResult;
 import org.bson.Document;
 import org.bson.conversions.Bson;
@@ -108,7 +106,7 @@
 						.noneMatch(id -> id.equals(u.getId())))
 				.forEach(this::insert);
 
-		addGroupToRole(aggregateRolesByGroup(false)
+		addGroupToRole(aggregateRolesByGroup()
 						.stream()
 						.map(UserGroupDto::getGroup)
 						.collect(Collectors.toSet()),
@@ -155,19 +153,15 @@
 	}
 
 	@Override
-	public List<UserGroupDto> aggregateRolesByGroup(boolean isAdmin) {
+	public List<UserGroupDto> aggregateRolesByGroup() {
 		final Document role = roleDocument();
 		final Bson groupBy = group(GROUPS, new BsonField(ROLES, new Document(ADD_TO_SET, role)));
 		final Bson lookup = lookup(USER_GROUPS, ID, ID, GROUP_INFO);
-		final List<Bson> pipeline = new ArrayList<>();
-		if (!isAdmin) {
-			pipeline.add(Aggregates.match(Filters.not(eq(ID, ADMIN))));
-		}
-		pipeline.addAll(Arrays.asList(unwind(GROUPS), groupBy, lookup,
+		final List<Bson> pipeline = Arrays.asList(unwind(GROUPS), groupBy, lookup,
 				project(new Document(GROUP, "$" + ID).append(GROUP_INFO, elementAt(GROUP_INFO, 0))
 						.append(ROLES, "$" + ROLES)),
 				project(new Document(GROUP, "$" + ID).append(USERS_FIELD, "$" + GROUP_INFO + "." + USERS_FIELD)
-						.append(ROLES, "$" + ROLES))));
+						.append(ROLES, "$" + ROLES)));
 
 		return stream(aggregate(MongoCollections.ROLES, pipeline))
 				.map(d -> convertFromDocument(d, UserGroupDto.class))
diff --git a/services/self-service/src/main/java/com/epam/dlab/backendapi/service/impl/UserGroupServiceImpl.java b/services/self-service/src/main/java/com/epam/dlab/backendapi/service/impl/UserGroupServiceImpl.java
index 1758a8b..0b05f84 100644
--- a/services/self-service/src/main/java/com/epam/dlab/backendapi/service/impl/UserGroupServiceImpl.java
+++ b/services/self-service/src/main/java/com/epam/dlab/backendapi/service/impl/UserGroupServiceImpl.java
@@ -97,14 +97,14 @@
 	@Override
 	public List<UserGroupDto> getAggregatedRolesByGroup(UserInfo user) {
 		if (UserRoles.isAdmin(user)) {
-			return userRoleDao.aggregateRolesByGroup(true);
+			return userRoleDao.aggregateRolesByGroup();
 		} else if (UserRoles.isProjectAdmin(user)) {
 			Set<String> groups = projectService.getProjects(user)
 					.stream()
 					.map(ProjectDTO::getGroups)
 					.flatMap(Collection::stream)
 					.collect(Collectors.toSet());
-			return userRoleDao.aggregateRolesByGroup(false)
+			return userRoleDao.aggregateRolesByGroup()
 					.stream()
 					.filter(userGroup -> groups.contains(userGroup.getGroup()))
 					.collect(Collectors.toList());