Introduce base requirement updater script for all repos

apps/util/requirements/base_requirement.txt

@@ -0,0 +1 @@
+cic-base==0.1.3a3+build.4aa03607

apps/util/requirements/requirements.txt

@@ -0,0 +1 @@
+requirements-magic~=0.0.2

apps/util/requirements/update_base.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+which pyreq-merge &> /dev/null
+if [ $? -gt 0 ]; then
+	>&2 echo pyreq-merge missing, please install requirements
+	exit 1
+fi
+
+t=$(mktemp)
+>&2 echo using tmp $t
+
+repos=(../../cic-cache ../../cic-eth ../../cic-ussd ../../data-seeding)
+
+for r in ${repos[@]}; do
+	f="$r/requirements.txt"
+	>&2 echo updating $f
+	pyreq-merge $f base_requirement.txt > $t
+	cp $t $f
+done