Squash redundant string concatenations introduced by google-java-format

Reformatting the code with google-java-format tool in change Id5f3c6de9
resulted in wrapped lines being unwrapped to the new 100 columns limit.

In cases where the wrapped line was wrapped on a string concatenation,
the resulting long line now includes redundant concatenations. See the
upstream issue [1] for an example of this.

Squash the redundant concatenations with:

  git ls-files | grep java$ | xargs sed -i '' 's/" + "//g'

(note: this also resulted in a couple of unwanted changes; those are
manually undone.)

[1] https://github.com/google/google-java-format/issues/122

Change-Id: I7348413ae460c8c7a0b0c72dab0a1ae7275a2ec3

gerrit-httpd/src/main/java/com/google/gerrit/httpd/ProjectBasicAuthFilter.java

@@ -181,7 +181,7 @@ class ProjectBasicAuthFilter implements Filter {
 
   private boolean failAuthentication(Response rsp, String username) throws IOException {
     log.warn(
-        "Authentication failed for {}: password does not match the one" + " stored in Gerrit",
+        "Authentication failed for {}: password does not match the one stored in Gerrit",
         username);
     rsp.sendError(SC_UNAUTHORIZED);
     return false;

gerrit-httpd/src/main/java/com/google/gerrit/httpd/WebSessionManager.java

@@ -71,7 +71,7 @@ public class WebSessionManager {
     if (sessionMaxAgeMillis < MINUTES.toMillis(5)) {
       log.warn(
           String.format(
-              "cache.%s.maxAge is set to %d milliseconds;" + " it should be at least 5 minutes.",
+              "cache.%s.maxAge is set to %d milliseconds; it should be at least 5 minutes.",
               CACHE_NAME, sessionMaxAgeMillis));
     }
   }