Fixed issue with space in param name (#356).

Author: gmessner

src/main/java/org/gitlab4j/api/GitLabApiForm.java

@@ -192,7 +192,7 @@ public GitLabApiForm withParam(String name, Object value, boolean required) thro
             throw new IllegalArgumentException(name + " cannot be empty or null");
         }
 
-        this.param(name, stringValue);
+        this.param(name.trim(), stringValue);
         return (this);
     }
 

src/main/java/org/gitlab4j/api/models/ProjectFilter.java

@@ -254,7 +254,7 @@ public GitLabApiForm getQueryParams() {
             .withParam("with_programming_language", withProgrammingLanguage)
             .withParam("wiki_checksum_failed", wikiChecksumFailed)
             .withParam("repository_checksum_failed", repositoryChecksumFailed)
-            .withParam("min_access_level ", (minAccessLevel != null ? minAccessLevel.toValue() : null)
+            .withParam("min_access_level", (minAccessLevel != null ? minAccessLevel.toValue() : null)
         );
     }
 }