Add External Interface NBI project into OOM

NBI (North Bound Interface) is one of the new project added for Beijing
release.

Features added
==============

MongoDB common chart
--------------------

Ability to start a mongo container, with a chart consistent with other
common charts (readiness, liveness, persistence, resources, nfs,
service, ...).

Specific configuration:
  * name of the db to create if needed

NBI chart
---------

Ability to start a mariadb container, with a chart consistent with other
common charts (readiness, liveness, persistence, resources, nfs,
service, ...).

Specific configuration:
  * name of the db to create if needed
  * name of the user that has access to the db
  * password of the user that has access to the db
  * root password of the database

Ability to start a NBI container, with a chart consistent with other
common charts (readiness, liveness, persistence, resources, nfs,
service, ...).

Specific configuration:
  * log level
  * cloudOwner
  * ecompInstanceId
  * openStackRegion
  * openStackServiceTenantName
  * sdc_authorization
  * aai_authorization
  * so_authorization

ONAP chart
----------

Added a requirement on NBI chart, possibility to enable/disable and
configuration to push to the chart.

Current Status
==============

- [*] adding a common chart for mongodb
- [*] make mongo chart compiling
- [*] testing the mongodb common role
- [*] creating a mariadb chart inside nbi helm
- [*] testing the mariadb chart
- [*] make mariadb chart compiling
- [*] make nbi use these charts
- [*] make nbi chart compiling
- [*] test the whole solution
- [*] create a service for nbi

Change-Id: I8dd3e79768c83b1553a05c892cf418f840931255
Issue-ID: EXTAPI-54
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
diff --git a/kubernetes/common/mongo/.helmignore b/kubernetes/common/mongo/.helmignore
new file mode 100644
index 0000000..f0c1319
--- /dev/null
+++ b/kubernetes/common/mongo/.helmignore
@@ -0,0 +1,21 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj