Added endpoint for retrieving member email addresses; CLI improvements

gms-client/gms-cli/pom.xml

...client/gms-cli/src/main/java/it/inaf/ia2/gms/cli/CLI.java

...t-lib/src/main/java/it/inaf/ia2/gms/client/GmsClient.java

...rc/main/java/it/inaf/ia2/gms/client/GmsClientBuilder.java

...rc/main/java/it/inaf/ia2/gms/client/call/BaseGmsCall.java

.../it/inaf/ia2/gms/client/call/GetMemberEmailAddresses.java

...n/java/it/inaf/ia2/gms/client/call/HttpClientWrapper.java

...b/src/test/java/it/inaf/ia2/gms/client/GmsClientTest.java

...va/it/inaf/ia2/gms/client/call/HttpClientWrapperTest.java

gms/pom.xml

...a/it/inaf/ia2/gms/controller/JWTWebServiceController.java

.../main/java/it/inaf/ia2/gms/manager/MembershipManager.java

gms/src/main/java/it/inaf/ia2/gms/model/Permission.java

gms/src/main/java/it/inaf/ia2/gms/model/RapUser.java

gms/src/main/resources/application.properties

gms/src/test/java/it/inaf/ia2/gms/model/PermissionTest.java