Add parents field to logEntry soy data for use in custom templates

Adding this field will enable custom templates to render parent shas in the log template.

Bug: Google b/291754461
Change-Id: Ie951cb4816920e3c75e8de28c583312f2b8e06a5

java/com/google/gitiles/LogSoyData.java

diff --git a/java/com/google/gitiles/LogSoyData.java b/java/com/google/gitiles/LogSoyData.java
index 34b290f..9cffbb3 100644
--- a/java/com/google/gitiles/LogSoyData.java
+++ b/java/com/google/gitiles/LogSoyData.java
@@ -47,7 +47,8 @@
           Field.AUTHOR,
           Field.COMMITTER,
           Field.BRANCHES,
-          Field.TAGS);
+          Field.TAGS,
+          Field.PARENTS);
   private static final ImmutableSet<Field> VERBOSE_FIELDS = Field.setOf(FIELDS, Field.DIFF_TREE);
 
   /** Behavior for the footer link when rendering streaming log data. */

resources/com/google/gitiles/templates/LogDetail.soy

diff --git a/resources/com/google/gitiles/templates/LogDetail.soy b/resources/com/google/gitiles/templates/LogDetail.soy
index 23ae8eb..095edbb 100644
--- a/resources/com/google/gitiles/templates/LogDetail.soy
+++ b/resources/com/google/gitiles/templates/LogDetail.soy
@@ -108,6 +108,7 @@
   {@param author: ?}  /** author information with at least "name" and "relativeTime" keys. */
   {@param committer: ?}  /** committer information with at least "time" and "relativeTime" keys. */
   {@param branches: ?}  /** list of branches for this entry, with "name" and "url" keys. */
+  {@param parents: ?}  /** unused in this variant. */
   {@param tags: ?}  /** list of tags for this entry, with "name" and "url" keys. */
   {@param diffTree: ?}  /** unused in this variant. */
   {@param rename: ?}  /** if this entry was a rename or a copy of the path, an object containg:
@@ -165,6 +166,7 @@
   {@param author: ?}  /** author information with at least "name" and "relativeTime" keys. */
   {@param committer: ?}  /** committer information with at least "time" and "relativeTime" keys. */
   {@param branches: ?}  /** list of branches for this entry, with "name" and "url" keys. */
+  {@param parents: ?}  /** unused in this variant. */
   {@param tags: ?}  /** list of tags for this entry, with "name" and "url" keys. */
   {@param diffTree: ?}  /** unused in this variant. */
   {@param rename: ?}  /** if this entry was a rename or a copy of the path, an object containg:
@@ -192,6 +194,7 @@
   {@param author: ?}  /** author information with at least "name" and "relativeTime" keys. */
   {@param committer: ?}  /** committer information with at least "time" and "relativeTime" keys. */
   {@param branches: ?}  /** list of branches for this entry, with "name" and "url" keys. */
+  {@param parents: ?}  /** unused in this variant. */
   {@param tags: ?}  /** list of tags for this entry, with "name" and "url" keys. */
   {@param diffTree: ?}  /** unused in this variant. */
   {@param rename: ?}  /** if this entry was a rename or a copy of the path, an object containg: