(RE-812) Update mock template with temporary band-aid

Since RHEL7 isn't really a released, baked, finished thing yet,
we have to reference the beta. This has a few caveats:
- x86_64 only
- None of the existing mock templates quite work

For the time being, support is being provided via a 'bandaid',
which simply declares a file resource for the mock config if a
RHEL7 host is to be built. This scaffold/band-aid/kludge will
be rolled back/removed/killed with fire when RHEL7 gets its wish
and the Blue Fairy makes it a real release.

manifests/mock/pl_mocks.pp

@@ -5,21 +5,38 @@
   $mock_root  = undef,
 ) {
 
-  rpmbuilder::mock::create_mock { "pl-${dist}-${name}-i386":
-    dist      => $dist,
-    release   => $name,
-    proxy     => $proxy,
-    vendor    => $vendor,
-    arch      => "i386",
-    mock_root => $mock_root,
-  }
+  # This is absolutely a bandaid; it's just here to stub
+  # out support for EL7, using the beta release. When EL7
+  # is a fully baked thing then this will reverted/updated
+  # to be 87% less hacky. For now we're also only using
+  # x86_64 as an arch, because EL7 beta is only x64_64.
+  if ($name == '7') and ($dist == 'el') {
+    file { 'pl-el-7-x86_64':
+      path    => "/etc/mock/pl-el-7-x86_64.cfg",
+      owner   => "root",
+      group   => "mock",
+      ensure  => present,
+      content => template("rpmbuilder/el7-bandaid.erb"),
+      mode    => "0644",
+    }
+
+  } else {
+    rpmbuilder::mock::create_mock { "pl-${dist}-${name}-i386":
+      dist      => $dist,
+      release   => $name,
+      proxy     => $proxy,
+      vendor    => $vendor,
+      arch      => "i386",
+      mock_root => $mock_root,
+    }
 
-  rpmbuilder::mock::create_mock { "pl-${dist}-${name}-x86_64":
-    dist      => $dist,
-    release   => $name,
-    proxy     => $proxy,
-    vendor    => $vendor,
-    arch      => "x86_64",
-    mock_root => $mock_root,
+    rpmbuilder::mock::create_mock { "pl-${dist}-${name}-x86_64":
+      dist      => $dist,
+      release   => $name,
+      proxy     => $proxy,
+      vendor    => $vendor,
+      arch      => "x86_64",
+      mock_root => $mock_root,
+    }
   }
 }

templates/el7-bandaid.erb

@@ -0,0 +1,38 @@
+# **********************************
+# Puppet Labs mock configuration
+# pl-el-7-x86_64
+# Managed by Puppet
+# **********************************
+
+config_opts['root'] = 'pl-el-7-x86_64'
+config_opts['target_arch'] = 'x86_64'
+config_opts['legal_host_arches'] = ('x86_64',)
+config_opts['chroot_setup_cmd'] = 'groupinstall buildsys-build'
+config_opts['dist'] = '7'  # only useful for --resultdir variable subst
+config_opts['macros']['%_host_vendor'] = 'Puppet User'
+config_opts['macros']['%rhel'] = '7'
+
+config_opts['yum.conf'] = """
+[main]
+cachedir=/var/cache/yum
+debuglevel=1
+logfile=/var/log/yum.log
+reposdir=/dev/null
+retries=20
+obsoletes=1
+gpgcheck=0
+assumeyes=1
+syslog_ident=mock
+syslog_device=
+proxy=http://modi.puppetlabs.lan:3128
+
+[beta]
+name=beta
+baseurl=http://ftp.redhat.com/redhat/rhel/beta/7/x86_64/os/
+
+[epel-el-7-x86_64]
+name=epel-el-7-x86_64
+mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=epel-7&arch=x86_64
+failovermethod=priority
+includepkgs=ccache
+"""