Add nexentastore backend support

This patch adds posibility to configure nexenta
config options.

Change-Id: Ib1badc1b87f9ffa30209514a64ddd3551d5dae36
Related-Prod: PROD-18093
diff --git a/.travis.yml b/.travis.yml
index 0308d00..b9d198d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,8 +19,10 @@
 env:
   - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2016.3 OS_VERSION=pike SUITE=server_cluster
   - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2016.3 OS_VERSION=pike SUITE=server_single
+  - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2016.3 OS_VERSION=pike SUITE=share_nexenta
   - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2017.7 OS_VERSION=pike SUITE=server_cluster
   - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2017.7 OS_VERSION=pike SUITE=server_single
+  - PLATFORM=epcim/salt-formulas:saltstack-ubuntu-xenial-salt-2017.7 OS_VERSION=pike SUITE=share_nexenta
 
 before_script:
   - set -o pipefail