EL6 docker tests now fully passing.

hacking/titotest-centos-6/Dockerfile

@@ -25,9 +25,15 @@ RUN yum -y install \
     python-mock \
     python-nose \
     python-pep8 \
+    rpm-build \
+    createrepo \
     tar \
     ; yum clean all
 
+RUN yum install -y python-devel
+RUN yum install -y which
+RUN yum install -y asciidoc docbook-style-xsl libxslt rpmdevtools
+
 RUN useradd sandbox
 RUN git config --system user.email "sandbox@example.com"
 RUN git config --system user.name  "sandbox"
@@ -36,5 +42,6 @@ USER sandbox
 VOLUME ["/home/sandbox"]
 WORKDIR /home/sandbox
 
+
 ENV LANG C
 CMD ["/bin/bash"]

src/tito/builder/main.py

@@ -1011,6 +1011,7 @@ class GitAnnexBuilder(NoTgzBuilder):
         old_cwd = os.getcwd()
         os.chdir(os.path.join(old_cwd, self.relative_project_dir))
 
+        # NOTE: 'which' may not be installed... (docker containers)
         (status, output) = getstatusoutput("which git-annex")
         if status != 0:
             msg = "Please run 'yum install git-annex' as root."