Skip input framework entries with missing but non-optional fields

The framework so far populated data structures with missing fields
even when those fields are defined without the &optional
attribute. When using the attribute, such entries continue to get
populated.

Update tests to reflect focus on unset fields.

testing/btest/Baseline/scripts.base.frameworks.input.empty-values-hashing/events.out

@@ -5,49 +5,55 @@ Description
   reader, Input::READER_ASCII
   mode, Input::REREAD
   name, ssh
-  destination[left = 1], [s=<uninitialized>, ss=TEST]
+  destination[left = 3], [s=TEST, ss=<uninitialized>]
+  idx, A::Idx
+  val, A::Val
+  want_record, T
+Type, Input::EVENT_NEW
+Left, [i=3]
+Right, [s=TEST, ss=<uninitialized>]
+============EVENT============
+Description
+  source, ../input.log
+  reader, Input::READER_ASCII
+  mode, Input::REREAD
+  name, ssh
+  destination[left = 4], [s=TEST, ss=TEST]
+  idx, A::Idx
+  val, A::Val
+  want_record, T
+Type, Input::EVENT_NEW
+Left, [i=4]
+Right, [s=TEST, ss=TEST]
+============EVENT============
+Description
+  source, ../input.log
+  reader, Input::READER_ASCII
+  mode, Input::REREAD
+  name, ssh
+  destination[left = 1], [s=TEST2, ss=<uninitialized>]
   idx, A::Idx
   val, A::Val
   want_record, T
 Type, Input::EVENT_NEW
 Left, [i=1]
-Right, [s=<uninitialized>, ss=TEST]
+Right, [s=TEST2, ss=<uninitialized>]
 ============EVENT============
 Description
   source, ../input.log
   reader, Input::READER_ASCII
   mode, Input::REREAD
   name, ssh
-  destination[left = 2], [s=<uninitialized>, ss=<uninitialized>]
-  idx, A::Idx
-  val, A::Val
-  want_record, T
-Type, Input::EVENT_NEW
-Left, [i=2]
-Right, [s=<uninitialized>, ss=<uninitialized>]
-============EVENT============
-Description
-  source, ../input.log
-  reader, Input::READER_ASCII
-  mode, Input::REREAD
-  name, ssh
-  destination[left = 1], [s=TEST, ss=<uninitialized>]
+  destination[left = 4], [s=TEST2, ss=TEST2]
   idx, A::Idx
   val, A::Val
   want_record, T
 Type, Input::EVENT_CHANGED
-Left, [i=1]
-Right, [s=<uninitialized>, ss=TEST]
+Left, [i=4]
+Right, [s=TEST, ss=TEST]
 ============EVENT============
 Description
   source, ../input.log
   reader, Input::READER_ASCII
   mode, Input::REREAD
   name, ssh
-  destination[left = 2], [s=TEST, ss=TEST]
-  idx, A::Idx
-  val, A::Val
-  want_record, T
-Type, Input::EVENT_CHANGED
-Left, [i=2]
-Right, [s=<uninitialized>, ss=<uninitialized>]

testing/btest/Baseline/scripts.base.frameworks.input.empty-values-hashing/preds.out

@@ -1,17 +1,21 @@
 ### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
 ============PREDICATE============
 Input::EVENT_NEW
-[i=1]
-[s=<uninitialized>, ss=TEST]
-============PREDICATE============
-Input::EVENT_NEW
-[i=2]
-[s=<uninitialized>, ss=<uninitialized>]
-============PREDICATE============
-Input::EVENT_CHANGED
-[i=1]
+[i=3]
 [s=TEST, ss=<uninitialized>]
 ============PREDICATE============
-Input::EVENT_CHANGED
-[i=2]
+Input::EVENT_NEW
+[i=4]
 [s=TEST, ss=TEST]
+============PREDICATE============
+Input::EVENT_NEW
+[i=1]
+[s=TEST2, ss=<uninitialized>]
+============PREDICATE============
+Input::EVENT_CHANGED
+[i=4]
+[s=TEST2, ss=TEST2]
+============PREDICATE============
+Input::EVENT_REMOVED
+[i=3]
+[s=TEST, ss=<uninitialized>]

testing/btest/Baseline/scripts.base.frameworks.input.empty-values-hashing/servers.out

@@ -1,12 +1,12 @@
 ### BTest baseline data generated by btest-diff. Do not edit. Use "btest -U/-u" to update. Requires BTest >= 0.63.
 ==========SERVERS============
 {
-[2] = [s=<uninitialized>, ss=<uninitialized>],
-[1] = [s=<uninitialized>, ss=TEST]
+[4] = [s=TEST, ss=TEST],
+[3] = [s=TEST, ss=<uninitialized>]
 }
 ==========SERVERS============
 {
-[2] = [s=TEST, ss=TEST],
-[1] = [s=TEST, ss=<uninitialized>]
+[4] = [s=TEST2, ss=TEST2],
+[1] = [s=TEST2, ss=<uninitialized>]
 }
 done