Fix basic15 and quotas01 to follow pwd best practices introduced with feature 10941

Change-Id: Idfc3ab48ea36bb0282882fec6dc300aa8da9e4aa
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>

robot-systest/testsuite/basic_15-rbac_configurations.robot

@@ -29,7 +29,7 @@ Suite Teardown   Run Keyword And Ignore Error   Suite Cleanup
 *** Variables ***
 # User, project and roles to use
 ${user_name}   basic_15_test_user
-${user_password}   basic_15_user_pass
+${user_password}   Basic_15_user_pass
 ${user_role}   project_user
 ${user_project}   admin
 ${project_name}   basic_15_test_project

robot-systest/testsuite/quotas_01-quota_enforcement.robot

@@ -38,7 +38,7 @@ ${project_3_quotas}   vnfds=5,nsds=,ns_instances=
 
 # User name and password for project
 ${user_name}   quotas_01_user
-${user_password}   quotas_01_pass
+${user_password}   Quotas_01_pass
 
 ${success_return_code}   0