renamed index files of two guides

Use bk_ instead of bk- to match the name of all other documents.

Use openstack-install-guide instead of openstackinstallguide.

Change-Id: I819774a726a3ac50bf0e9a82a03a53a6ae8c674c

doc/install-guide/pom.xml

@@ -71,7 +71,7 @@
                     <xincludeSupported>true</xincludeSupported>
                     <sourceDirectory>.</sourceDirectory>
                     <includes>
-                        bk_openstackinstallguide.xml
+                        bk-openstack-install-guide.xml
                     </includes>
                     <canonicalUrlBase>http://docs.openstack.org/${release.path.name}/install-guide/install/${operating.system}/content</canonicalUrlBase>
                     <branding>openstack</branding>

doc/security-guide/pom.xml

@@ -30,7 +30,7 @@
                         </goals>
                         <phase>generate-sources</phase>
                         <configuration>
-                            <includes>bk_openstack-sec-guide.xml</includes>
+                            <includes>bk-openstack-sec-guide.xml</includes>
                             <sourceDirectory>.</sourceDirectory>
                             <glossaryCollection>${basedir}/../glossary/glossary-terms.xml</glossaryCollection>
                             <webhelpDirname>security-guide</webhelpDirname>