Java, adds mising const info to schema docs (#372)

* Templates updated

* Adds constValue info

Author: spacether

samples/client/3_1_0_unit_test/java/docs/components/schemas/ConstNulCharactersInStrings.md

@@ -21,6 +21,7 @@ A schema class that validates payloads
 ### Field Summary
 | Modifier and Type | Field and Description |
 | ----------------- | ---------------------- |
+| @Nullable Object | constValue = "hello\0there" |
 
 ### Method Summary
 | Modifier and Type | Method and Description |

samples/client/3_1_0_unit_test/java/docs/components/schemas/IfAppearsAtTheEndWhenSerializedKeywordProcessingSequence.md

@@ -51,6 +51,7 @@ A schema class that validates payloads
 ### Field Summary
 | Modifier and Type | Field and Description |
 | ----------------- | ---------------------- |
+| @Nullable Object | constValue = "yes" |
 
 ### Method Summary
 | Modifier and Type | Method and Description |
@@ -109,6 +110,7 @@ A schema class that validates payloads
 ### Field Summary
 | Modifier and Type | Field and Description |
 | ----------------- | ---------------------- |
+| @Nullable Object | constValue = "other" |
 
 ### Method Summary
 | Modifier and Type | Method and Description |

samples/client/3_1_0_unit_test/java/docs/components/schemas/IgnoreElseWithoutIf.md

@@ -46,6 +46,7 @@ A schema class that validates payloads
 ### Field Summary
 | Modifier and Type | Field and Description |
 | ----------------- | ---------------------- |
+| @Nullable Object | constValue = "0" |
 
 ### Method Summary
 | Modifier and Type | Method and Description |

samples/client/3_1_0_unit_test/java/docs/components/schemas/IgnoreIfWithoutThenOrElse.md

@@ -46,6 +46,7 @@ A schema class that validates payloads
 ### Field Summary
 | Modifier and Type | Field and Description |
 | ----------------- | ---------------------- |
+| @Nullable Object | constValue = "0" |
 
 ### Method Summary
 | Modifier and Type | Method and Description |

samples/client/3_1_0_unit_test/java/docs/components/schemas/IgnoreThenWithoutIf.md

@@ -46,6 +46,7 @@ A schema class that validates payloads
 ### Field Summary
 | Modifier and Type | Field and Description |
 | ----------------- | ---------------------- |
+| @Nullable Object | constValue = "0" |
 
 ### Method Summary
 | Modifier and Type | Method and Description |

src/main/resources/java/src/main/java/packagename/components/schemas/docschema_fields_field.hbs

@@ -106,3 +106,6 @@
 {{#if else_}}
 | Class<? extends JsonSchema> | {{> src/main/java/packagename/components/schemas/SchemaClass/_else }} |
 {{/if}}
+{{#if constInfo}}
+| @Nullable Object | {{> src/main/java/packagename/components/schemas/SchemaClass/_const }} |
+{{/if}}