bugfix dx deploy failures (#548)

* formatting of megablast wdl for consistency; add memory reporting to kraken2 and krakenuniq tasks

* (re)formatting of blastoff.wdl

* change in scope of blast_hits_output in  ChunkBlastHits

* trigger dnanexus deployment on PRs targeting master

* cancel earlier actions, if a commit is added to a branch or a PR

* apply GH Actions concurrency limit only to deploy_dnanexus job

* allow the user to pass an email address as an input to fetch_sra_to_bam (for NCBI API access)

.github/workflows/build.yml

@@ -292,7 +292,11 @@ jobs:
 
   deploy_dnanexus:
     #if: ${{ github.event.ref == 'dnanexus' }}
-    if: github.event_name == 'release' || github.ref == 'refs/heads/master' || github.ref == 'refs/heads/dnanexus'
+    if: github.event_name == 'release' || github.ref == 'refs/heads/master' || github.ref == 'refs/heads/dnanexus' || (github.event_name == 'pull_request' && github.base_ref == 'master')
+    # cancel earlier actions, if a commit is added to a branch or a PR
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+      cancel-in-progress: true
     needs:
       - validate_wdl_womtool
       - validate_wdl_miniwdl