capm3: temporarily downgrade to 1.7.2

To align with the current rancher turtles chart we need to align with
1.7.2, which matches the 1.7.x CAPI core provided by this turtles release

cluster-api-provider-metal3/_service

@@ -2,7 +2,7 @@
  <service name="obs_scm">
     <param name="url">https://github.com/metal3-io/cluster-api-provider-metal3</param>
     <param name="scm">git</param>
-    <param name="revision">v1.8.2</param>
+    <param name="revision">v1.7.2</param>
     <param name="version">_auto_</param>
     <param name="versionformat">@PARENT_TAG@</param>
     <param name="changesgenerate">enable</param>

cluster-api-provider-metal3/cluster-api-provider-metal3.spec

@@ -17,7 +17,7 @@
 
 
 Name:           cluster-api-provider-metal3
-Version:        1.8.2
+Version:        1.7.2
 Release:        0
 Summary:        Cluster API Infrastructure Provider for Metal3
 License:        Apache-2.0

ip-address-manager/_service

@@ -2,7 +2,7 @@
  <service name="obs_scm">
     <param name="url">https://github.com/metal3-io/ip-address-manager</param>
     <param name="scm">git</param>
-    <param name="revision">v1.8.1</param>
+    <param name="revision">v1.7.2</param>
     <param name="version">_auto_</param>
     <param name="versionformat">@PARENT_TAG@</param>
     <param name="changesgenerate">enable</param>

ip-address-manager/ip-address-manager.spec

@@ -17,7 +17,7 @@
 
 
 Name:           ip-address-manager
-Version:        1.8.1
+Version:        1.7.2
 Release:        0
 Summary:        Metal3 IPAM controller
 License:        Apache-2.0