Problem: (CRO-654) Unnoticed warnings in CI

Solution: Terminate on warnings on CI

.drone.yml

@@ -70,11 +70,11 @@ steps:
   - ls -l /dev/sgx
   - ls -l /var/run/aesmd/aesm.socket
   - docker run --name hw1-${DRONE_COMMIT_SHA} --rm -v $PWD:/chain --device /dev/sgx cryptocom/chain:latest /bin/bash /chain/ci-scripts/tx-validation-hw-test.sh
-- name: Teardown		
-  commands:		
+- name: Teardown
+  commands:
    - docker stop hw1-${DRONE_COMMIT_SHA} || exit 0		
-  when:		
-    status:		
+  when:
+    status:
       - success		
       - failure
 
@@ -106,11 +106,11 @@ steps:
   - ls -l /dev/sgx
   - ls -l /var/run/aesmd/aesm.socket
   - docker run --name hw2-${DRONE_COMMIT_SHA} --rm --env SPID=$SPID --env IAS_API_KEY=$IAS_API_KEY -v $PWD:/chain --device /dev/sgx cryptocom/chain:latest /bin/bash /chain/ci-scripts/tx-query-hw-test.sh
-- name: Teardown		
-  commands:		
+- name: Teardown
+  commands:
    - docker stop hw2-${DRONE_COMMIT_SHA} || exit 0		
-  when:		
-    status:		
+  when:
+    status:
       - success		
       - failure
 

.travis.yml

@@ -46,7 +46,7 @@ rust: &rust
     - rm -rf $HOME/.cargo/registry/src
   env:
     - RUST_BACKTRACE=1
-    - RUSTFLAGS=-Ctarget-feature=+aes,+sse2,+sse4.1,+ssse3
+    - RUSTFLAGS="-Ctarget-feature=+aes,+sse2,+sse4.1,+ssse3 -D warnings"
     - PATH=$HOME/.local/bin:$PATH
     - LD_LIBRARY_PATH=$HOME/lib
     - PKG_CONFIG_PATH=$HOME/lib/pkgconfig
@@ -64,11 +64,11 @@ rust: &rust
     - |
       if [[ "$TRAVIS_RUST_VERSION" == stable ]]; then
         (rustfmt --version || rustup component add rustfmt)
-        cargo fmt -- --check --color=auto
+        cargo fmt -- --check --color=auto || travis_terminate 1
         (cargo-clippy --version || rustup component add clippy)
-        cargo clippy -- -D warnings
+        cargo clippy -- -D warnings || travis_terminate 1
         (cargo-audit -h || cargo install cargo-audit)
-        cargo audit
+        cargo audit || travis_terminate 1
       fi
 
   after_success: |