RPM spec and patches for sles 11 (netdata#3708)

* RPM spec and patches for sles 11

* some fixes to alarm-notify.bash3 to make codacity happy

* replace ugly bash3 alarm notifier with trimmed rewrite

* notification format fixes

* update README for sles11 contrib

Author: veksh

contrib/sles11/README.md

@@ -0,0 +1,9 @@
+# spec to build netdata RPM for sles 11
+
+Based on [opensuse rpm spec](https://build.opensuse.org/package/show/network/netdata) with some 
+changes and additions for sles 11 backport, namely:
+- init.d script 
+- run-time dependency on python ordereddict backport
+- patch for netdata python.d plugin to work with older python
+- crude hack of notification script to work with bash 3 (email and syslog only, one destination,
+  see comments at the top)