fix FTBFS

[gil]

hi
an other fix for
nailgun: https://bugzilla.redhat.com/show_bug.cgi?id=1307790
              https://bugzilla.redhat.com/show_bug.cgi?id=1239704
regards
.g
p.s. suggestion, split the package:

%package all
Summary:     Nailgun Parent POM
BuildArch:     noarch

%description all
This package provides Nailgun Parent POM.

%package examples
Summary: Examples for %{name}
BuildArch:     noarch

%description examples
This package contains examples for %{name}.

%build
# Split the package in its own sub-projects
%mvn_build -s

%install
%mvn_install

%files -f .mfiles-%{name}-server
%doc README.md

%files all -f .mfiles-%{name}-all

%files examples -f .mfiles-%{name}-examples

%files javadoc -f .mfiles-javadoc