Fix unexpected ZPM impact

ZPM reports the installer class via GetOther which was messing up package manager awareness for the git repo root. (Really convoluted how this ended up happening.)

This code is intended for BPL/DTL only so it makes sense to enforce that.

Author: isc-tleavitt

cls/SourceControl/Git/Utils.cls

@@ -740,7 +740,7 @@ ClassMethod Type(InternalName As %String) As %String
 	// For an abstract document, use the GetOther() method to try to determine its "real" class
 	If ##class(%RoutineMgr).UserType(InternalName,.docclass,.doctype) {
 		// Check for a real abstract document subclass (or GetOther() may not work)
-		If $classmethod(docclass,"%IsA","%Studio.AbstractDocument") {
+		If $classmethod(docclass,"%IsA","%Studio.AbstractDocument") && $classmethod(docclass,"%Extends","Ens.Util.AbstractDocument") {
 			// Grab the actual name
 			Set actualName = $classmethod(docclass,"GetOther",InternalName)
 			// The actualName is only valid if we get a single .cls as a result
@@ -1492,7 +1492,7 @@ ClassMethod Name(InternalName As %String, ByRef MappingExists As %Boolean) As %S
     // For an abstract document, use the GetOther() method to try to determine its "real" class
     if usertype,##class(%RoutineMgr).UserType(InternalName,.docclass,.doctype) {
         // Check for a real abstract document subclass (or GetOther() may not work)
-        if $classmethod(docclass,"%IsA","%Studio.AbstractDocument") {
+        if $classmethod(docclass,"%IsA","%Studio.AbstractDocument") && $classmethod(docclass,"%Extends","Ens.Util.AbstractDocument") {
             // Grab the actual name
             set actualName = $classmethod(docclass,"GetOther",InternalName)
             // The actualName is only valid if we get a single .cls as a result
@@ -1919,3 +1919,4 @@ ClassMethod BuildCEInstallationPackage(ByRef destination As %String) As %Status
 }
 
 }
+