Added taint and toleration glossary entries (#12162)

* Added taint and toleration glossary entries

* Fixed syntax for tooltip references

* Fixed the last syntax error for tooltip references

content/en/docs/reference/glossary/taint.md

@@ -0,0 +1,18 @@
+---
+title: Taint
+id: taint
+date: 2019-01-11
+full_link: docs/concepts/configuration/taint-and-toleration/
+short_description: >
+  A key-value pair and an effect to prevent the scheduling of pods on nodes or node groups.
+
+aka:
+tags:
+- core-object
+- fundamental
+---
+ A key-value pair and an effect to prevent the scheduling of pods on nodes or node groups.
+
+<!--more-->
+
+Taints and {{< glossary_tooltip text="Tolerations" term_id="toleration" >}} work together to ensure that pods are not scheduled onto inappropriate nodes. One or more taints are applied to a {{< glossary_tooltip text="node" term_id="node" >}}; this marks that the {{< glossary_tooltip text="node" term_id="node" >}} should not accept any pods that do not tolerate the taints.

content/en/docs/reference/glossary/toleration.md

@@ -0,0 +1,18 @@
+---
+title: Toleration
+id: toleration
+date: 2019-01-11
+full_link: docs/concepts/configuration/taint-and-toleration/
+short_description: >
+  A key-value pair and an effect to enable the scheduling of pods on nodes or node groups that have a matching {% glossary_tooltip term_id="taint" %}.
+
+aka:
+tags:
+- core-object
+- fundamental
+---
+ A key-value pair and an effect to enable the scheduling of pods on nodes or node groups that have a matching {{< glossary_tooltip text="taints" term_id="taint" >}}.
+
+<!--more-->
+
+Tolerations and {{< glossary_tooltip text="Taints" term_id="taint" >}} work together to ensure that pods are not scheduled onto inappropriate nodes. One or more tolerations are applied to a {{< glossary_tooltip text="pod" term_id="pod" >}}; this marks that the {{< glossary_tooltip text="pod" term_id="pod" >}} is allowed (but not required) to be scheduled on nodes or node groups with matching {{< glossary_tooltip text="taints" term_id="taint" >}}.