Improve issue search (#2387)

* Improve issue indexer

* Fix new issue sqlite bug

* Different test indexer paths for each db

* Add integration indexer paths to make clean

models/fixtures/issue.yml

@@ -5,7 +5,7 @@
   poster_id: 1
   assignee_id: 1
   name: issue1
-  content: content1
+  content: content for the first issue
   is_closed: false
   is_pull: false
   num_comments: 2
@@ -18,7 +18,7 @@
   index: 2
   poster_id: 1
   name: issue2
-  content: content2
+  content: content for the second issue
   milestone_id: 1
   is_closed: false
   is_pull: true
@@ -32,7 +32,7 @@
   index: 3
   poster_id: 1
   name: issue3
-  content: content4
+  content: content for the third issue
   is_closed: false
   is_pull: true
   created_unix: 946684820
@@ -44,7 +44,7 @@
   index: 1
   poster_id: 2
   name: issue4
-  content: content4
+  content: content for the fourth issue
   is_closed: true
   is_pull: false
 
@@ -54,7 +54,7 @@
   index: 4
   poster_id: 2
   name: issue5
-  content: content5
+  content: content for the fifth issue
   is_closed: true
   is_pull: false
 -