Unhardcode SolidFire options

this patch makes it possible to set sf_allow_template_caching and
sf_provisioning_calc for the SolidFire backend in Cinder.

Related-PROD: PROD-34109
Change-Id: I520b2f51c8254798e33b5534f3b2cc7b9c8c077b
diff --git a/cinder/files/backend/_solidfire.conf b/cinder/files/backend/_solidfire.conf
index 8ad70c3..673027a 100644
--- a/cinder/files/backend/_solidfire.conf
+++ b/cinder/files/backend/_solidfire.conf
@@ -17,4 +17,10 @@
 {%- if backend.sf_account_prefix is defined %}
 sf_account_prefix = {{ backend.sf_account_prefix }}
 {%- endif %}
+{%- if backend.sf_allow_template_caching is defined %}
+sf_allow_template_caching = {{ backend.sf_allow_template_caching }}
+{%- endif %}
+{%- if backend.sf_provisioning_calc is defined %}
+sf_provisioning_calc = {{ backend.sf_provisioning_calc }}
+{%- endif %}
 image_volume_cache_enabled={{ backend.get('image_volume_cache_enabled', False)|lower }}
\ No newline at end of file