Update login_identity_providers.xml template for 2.0.0-M1

[juldrixx]

Q	A
Bug fix?	no
New feature?	no
API breaks?	no
Deprecations?	no
Related tickets	partial #360
License	Apache 2.0

What's in this PR?

Update of the login_identity_providers.xml template, to match the one in 2.0.0-M1. Changed:

<property name="Identity Strategy">{{.LdapConfiguration.IdentityStrategy}}</property>
<property name="Identity Strategy">{{or .LdapConfiguration.IdentityStrategy "USE_DN"}}</property>

to

<property name="Identity Strategy">{{or .LdapConfiguration.IdentityStrategy "USE_DN"}}</property>

Why?

<property name="Identity Strategy">{{.LdapConfiguration.IdentityStrategy}}</property> removed because it doesn't make sense to have it when you have <property name="Identity Strategy">{{or .LdapConfiguration.IdentityStrategy "USE_DN"}}</property>. Because if .LdapConfiguration.IdentityStrategy is empty, you will have USE_DN otherwise you will have the value of .LdapConfiguration.IdentityStrategy.

Checklist

• [X] Implementation tested
• [X] Error handling code meets the guideline
• [X] Logging code meets the guideline
• [X] User guide and development docs updated (if needed)
• [x] Append changelog with changes

[juldrixx]

This PR can me merged no impact for older version of NiFi.