fix(specs): Fix intermittent async error and max event listener leak

An absolute ContactStore spec was causing the listener leak by
re-initializing the store and not cleaning it up.

Intermittent theme manager failing spec might be caused due to timing of
the theme activation

spec/stores/contact-store-spec.coffee

@@ -27,16 +27,11 @@ describe "ContactStore", ->
     ContactStore._contactCache = []
     ContactStore._fetchOffset = 0
     ContactStore._accountId = null
+    ContactRankingStore.reset()
 
   afterEach ->
     atom.testOrganizationUnit = null
 
-  it "initializes the cache from the DB", ->
-    spyOn(DatabaseStore, "findAll").andCallFake -> Promise.resolve([])
-    ContactStore.constructor()
-    expect(ContactStore._contactCache.length).toBe 0
-    expect(ContactStore._fetchOffset).toBe 0
-
   describe "when the Account updates from null to valid", ->
     beforeEach ->
       spyOn(ContactStore, "_refreshCache")

spec/theme-manager-spec.coffee

@@ -318,7 +318,7 @@ describe "ThemeManager", ->
         [stylesheetRemovedHandler, stylesheetAddedHandler, stylesheetsChangedHandler] = []
 
         waitsForPromise ->
-          themeManager.activateThemes()
+          themeManager.activateThemes().then ->
 
             runs ->
               atom.styles.onDidRemoveStyleElement styleElementRemovedHandler = jasmine.createSpy("styleElementRemovedHandler")