fixed minor bugs in contact server, all is good now

...ore/src/main/java/net/jami/datastore/dao/AbstractDao.java

...tore/src/main/java/net/jami/datastore/dao/ContactDao.java

integration-test/contact-test.py

integration-test/install-server.py

...java/net/jami/jams/common/dao/DeleteStatementBuilder.java

...java/net/jami/jams/common/dao/SelectStatementBuilder.java

...c/main/java/net/jami/jams/server/core/TomcatLauncher.java

...ams/server/servlets/api/auth/contacts/ContactServlet.java